lanai.c revision 284901a90a9e0b812ca3f5f852cbbfb60d10249d
1/* lanai.c -- Copyright 1999-2003 by Mitchell Blank Jr <mitch@sfgoth.com> 2 * 3 * This program is free software; you can redistribute it and/or 4 * modify it under the terms of the GNU General Public License 5 * as published by the Free Software Foundation; either version 6 * 2 of the License, or (at your option) any later version. 7 * 8 * This driver supports ATM cards based on the Efficient "Lanai" 9 * chipset such as the Speedstream 3010 and the ENI-25p. The 10 * Speedstream 3060 is currently not supported since we don't 11 * have the code to drive the on-board Alcatel DSL chipset (yet). 12 * 13 * Thanks to Efficient for supporting this project with hardware, 14 * documentation, and by answering my questions. 15 * 16 * Things not working yet: 17 * 18 * o We don't support the Speedstream 3060 yet - this card has 19 * an on-board DSL modem chip by Alcatel and the driver will 20 * need some extra code added to handle it 21 * 22 * o Note that due to limitations of the Lanai only one VCC can be 23 * in CBR at once 24 * 25 * o We don't currently parse the EEPROM at all. The code is all 26 * there as per the spec, but it doesn't actually work. I think 27 * there may be some issues with the docs. Anyway, do NOT 28 * enable it yet - bugs in that code may actually damage your 29 * hardware! Because of this you should hardware an ESI before 30 * trying to use this in a LANE or MPOA environment. 31 * 32 * o AAL0 is stubbed in but the actual rx/tx path isn't written yet: 33 * vcc_tx_aal0() needs to send or queue a SKB 34 * vcc_tx_unqueue_aal0() needs to attempt to send queued SKBs 35 * vcc_rx_aal0() needs to handle AAL0 interrupts 36 * This isn't too much work - I just wanted to get other things 37 * done first. 38 * 39 * o lanai_change_qos() isn't written yet 40 * 41 * o There aren't any ioctl's yet -- I'd like to eventually support 42 * setting loopback and LED modes that way. 43 * 44 * o If the segmentation engine or DMA gets shut down we should restart 45 * card as per section 17.0i. (see lanai_reset) 46 * 47 * o setsockopt(SO_CIRANGE) isn't done (although despite what the 48 * API says it isn't exactly commonly implemented) 49 */ 50 51/* Version history: 52 * v.1.00 -- 26-JUL-2003 -- PCI/DMA updates 53 * v.0.02 -- 11-JAN-2000 -- Endian fixes 54 * v.0.01 -- 30-NOV-1999 -- Initial release 55 */ 56 57#include <linux/module.h> 58#include <linux/mm.h> 59#include <linux/atmdev.h> 60#include <asm/io.h> 61#include <asm/byteorder.h> 62#include <linux/spinlock.h> 63#include <linux/pci.h> 64#include <linux/dma-mapping.h> 65#include <linux/init.h> 66#include <linux/delay.h> 67#include <linux/interrupt.h> 68 69/* -------------------- TUNABLE PARAMATERS: */ 70 71/* 72 * Maximum number of VCIs per card. Setting it lower could theoretically 73 * save some memory, but since we allocate our vcc list with get_free_pages, 74 * it's not really likely for most architectures 75 */ 76#define NUM_VCI (1024) 77 78/* 79 * Enable extra debugging 80 */ 81#define DEBUG 82/* 83 * Debug _all_ register operations with card, except the memory test. 84 * Also disables the timed poll to prevent extra chattiness. This 85 * isn't for normal use 86 */ 87#undef DEBUG_RW 88 89/* 90 * The programming guide specifies a full test of the on-board SRAM 91 * at initialization time. Undefine to remove this 92 */ 93#define FULL_MEMORY_TEST 94 95/* 96 * This is the number of (4 byte) service entries that we will 97 * try to allocate at startup. Note that we will end up with 98 * one PAGE_SIZE's worth regardless of what this is set to 99 */ 100#define SERVICE_ENTRIES (1024) 101/* TODO: make above a module load-time option */ 102 103/* 104 * We normally read the onboard EEPROM in order to discover our MAC 105 * address. Undefine to _not_ do this 106 */ 107/* #define READ_EEPROM */ /* ***DONT ENABLE YET*** */ 108/* TODO: make above a module load-time option (also) */ 109 110/* 111 * Depth of TX fifo (in 128 byte units; range 2-31) 112 * Smaller numbers are better for network latency 113 * Larger numbers are better for PCI latency 114 * I'm really sure where the best tradeoff is, but the BSD driver uses 115 * 7 and it seems to work ok. 116 */ 117#define TX_FIFO_DEPTH (7) 118/* TODO: make above a module load-time option */ 119 120/* 121 * How often (in jiffies) we will try to unstick stuck connections - 122 * shouldn't need to happen much 123 */ 124#define LANAI_POLL_PERIOD (10*HZ) 125/* TODO: make above a module load-time option */ 126 127/* 128 * When allocating an AAL5 receiving buffer, try to make it at least 129 * large enough to hold this many max_sdu sized PDUs 130 */ 131#define AAL5_RX_MULTIPLIER (3) 132/* TODO: make above a module load-time option */ 133 134/* 135 * Same for transmitting buffer 136 */ 137#define AAL5_TX_MULTIPLIER (3) 138/* TODO: make above a module load-time option */ 139 140/* 141 * When allocating an AAL0 transmiting buffer, how many cells should fit. 142 * Remember we'll end up with a PAGE_SIZE of them anyway, so this isn't 143 * really critical 144 */ 145#define AAL0_TX_MULTIPLIER (40) 146/* TODO: make above a module load-time option */ 147 148/* 149 * How large should we make the AAL0 receiving buffer. Remember that this 150 * is shared between all AAL0 VC's 151 */ 152#define AAL0_RX_BUFFER_SIZE (PAGE_SIZE) 153/* TODO: make above a module load-time option */ 154 155/* 156 * Should we use Lanai's "powerdown" feature when no vcc's are bound? 157 */ 158/* #define USE_POWERDOWN */ 159/* TODO: make above a module load-time option (also) */ 160 161/* -------------------- DEBUGGING AIDS: */ 162 163#define DEV_LABEL "lanai" 164 165#ifdef DEBUG 166 167#define DPRINTK(format, args...) \ 168 printk(KERN_DEBUG DEV_LABEL ": " format, ##args) 169#define APRINTK(truth, format, args...) \ 170 do { \ 171 if (unlikely(!(truth))) \ 172 printk(KERN_ERR DEV_LABEL ": " format, ##args); \ 173 } while (0) 174 175#else /* !DEBUG */ 176 177#define DPRINTK(format, args...) 178#define APRINTK(truth, format, args...) 179 180#endif /* DEBUG */ 181 182#ifdef DEBUG_RW 183#define RWDEBUG(format, args...) \ 184 printk(KERN_DEBUG DEV_LABEL ": " format, ##args) 185#else /* !DEBUG_RW */ 186#define RWDEBUG(format, args...) 187#endif 188 189/* -------------------- DATA DEFINITIONS: */ 190 191#define LANAI_MAPPING_SIZE (0x40000) 192#define LANAI_EEPROM_SIZE (128) 193 194typedef int vci_t; 195typedef void __iomem *bus_addr_t; 196 197/* DMA buffer in host memory for TX, RX, or service list. */ 198struct lanai_buffer { 199 u32 *start; /* From get_free_pages */ 200 u32 *end; /* One past last byte */ 201 u32 *ptr; /* Pointer to current host location */ 202 dma_addr_t dmaaddr; 203}; 204 205struct lanai_vcc_stats { 206 unsigned rx_nomem; 207 union { 208 struct { 209 unsigned rx_badlen; 210 unsigned service_trash; 211 unsigned service_stream; 212 unsigned service_rxcrc; 213 } aal5; 214 struct { 215 } aal0; 216 } x; 217}; 218 219struct lanai_dev; /* Forward declaration */ 220 221/* 222 * This is the card-specific per-vcc data. Note that unlike some other 223 * drivers there is NOT a 1-to-1 correspondance between these and 224 * atm_vcc's - each one of these represents an actual 2-way vcc, but 225 * an atm_vcc can be 1-way and share with a 1-way vcc in the other 226 * direction. To make it weirder, there can even be 0-way vccs 227 * bound to us, waiting to do a change_qos 228 */ 229struct lanai_vcc { 230 bus_addr_t vbase; /* Base of VCC's registers */ 231 struct lanai_vcc_stats stats; 232 int nref; /* # of atm_vcc's who reference us */ 233 vci_t vci; 234 struct { 235 struct lanai_buffer buf; 236 struct atm_vcc *atmvcc; /* atm_vcc who is receiver */ 237 } rx; 238 struct { 239 struct lanai_buffer buf; 240 struct atm_vcc *atmvcc; /* atm_vcc who is transmitter */ 241 int endptr; /* last endptr from service entry */ 242 struct sk_buff_head backlog; 243 void (*unqueue)(struct lanai_dev *, struct lanai_vcc *, int); 244 } tx; 245}; 246 247enum lanai_type { 248 lanai2 = PCI_DEVICE_ID_EF_ATM_LANAI2, 249 lanaihb = PCI_DEVICE_ID_EF_ATM_LANAIHB 250}; 251 252struct lanai_dev_stats { 253 unsigned ovfl_trash; /* # of cells dropped - buffer overflow */ 254 unsigned vci_trash; /* # of cells dropped - closed vci */ 255 unsigned hec_err; /* # of cells dropped - bad HEC */ 256 unsigned atm_ovfl; /* # of cells dropped - rx fifo overflow */ 257 unsigned pcierr_parity_detect; 258 unsigned pcierr_serr_set; 259 unsigned pcierr_master_abort; 260 unsigned pcierr_m_target_abort; 261 unsigned pcierr_s_target_abort; 262 unsigned pcierr_master_parity; 263 unsigned service_notx; 264 unsigned service_norx; 265 unsigned service_rxnotaal5; 266 unsigned dma_reenable; 267 unsigned card_reset; 268}; 269 270struct lanai_dev { 271 bus_addr_t base; 272 struct lanai_dev_stats stats; 273 struct lanai_buffer service; 274 struct lanai_vcc **vccs; 275#ifdef USE_POWERDOWN 276 int nbound; /* number of bound vccs */ 277#endif 278 enum lanai_type type; 279 vci_t num_vci; /* Currently just NUM_VCI */ 280 u8 eeprom[LANAI_EEPROM_SIZE]; 281 u32 serialno, magicno; 282 struct pci_dev *pci; 283 DECLARE_BITMAP(backlog_vccs, NUM_VCI); /* VCCs with tx backlog */ 284 DECLARE_BITMAP(transmit_ready, NUM_VCI); /* VCCs with transmit space */ 285 struct timer_list timer; 286 int naal0; 287 struct lanai_buffer aal0buf; /* AAL0 RX buffers */ 288 u32 conf1, conf2; /* CONFIG[12] registers */ 289 u32 status; /* STATUS register */ 290 spinlock_t endtxlock; 291 spinlock_t servicelock; 292 struct atm_vcc *cbrvcc; 293 int number; 294 int board_rev; 295/* TODO - look at race conditions with maintence of conf1/conf2 */ 296/* TODO - transmit locking: should we use _irq not _irqsave? */ 297/* TODO - organize above in some rational fashion (see <asm/cache.h>) */ 298}; 299 300/* 301 * Each device has two bitmaps for each VCC (baclog_vccs and transmit_ready) 302 * This function iterates one of these, calling a given function for each 303 * vci with their bit set 304 */ 305static void vci_bitfield_iterate(struct lanai_dev *lanai, 306 const unsigned long *lp, 307 void (*func)(struct lanai_dev *,vci_t vci)) 308{ 309 vci_t vci = find_first_bit(lp, NUM_VCI); 310 while (vci < NUM_VCI) { 311 func(lanai, vci); 312 vci = find_next_bit(lp, NUM_VCI, vci + 1); 313 } 314} 315 316/* -------------------- BUFFER UTILITIES: */ 317 318/* 319 * Lanai needs DMA buffers aligned to 256 bytes of at least 1024 bytes - 320 * usually any page allocation will do. Just to be safe in case 321 * PAGE_SIZE is insanely tiny, though... 322 */ 323#define LANAI_PAGE_SIZE ((PAGE_SIZE >= 1024) ? PAGE_SIZE : 1024) 324 325/* 326 * Allocate a buffer in host RAM for service list, RX, or TX 327 * Returns buf->start==NULL if no memory 328 * Note that the size will be rounded up 2^n bytes, and 329 * if we can't allocate that we'll settle for something smaller 330 * until minbytes 331 */ 332static void lanai_buf_allocate(struct lanai_buffer *buf, 333 size_t bytes, size_t minbytes, struct pci_dev *pci) 334{ 335 int size; 336 337 if (bytes > (128 * 1024)) /* max lanai buffer size */ 338 bytes = 128 * 1024; 339 for (size = LANAI_PAGE_SIZE; size < bytes; size *= 2) 340 ; 341 if (minbytes < LANAI_PAGE_SIZE) 342 minbytes = LANAI_PAGE_SIZE; 343 do { 344 /* 345 * Technically we could use non-consistent mappings for 346 * everything, but the way the lanai uses DMA memory would 347 * make that a terrific pain. This is much simpler. 348 */ 349 buf->start = pci_alloc_consistent(pci, size, &buf->dmaaddr); 350 if (buf->start != NULL) { /* Success */ 351 /* Lanai requires 256-byte alignment of DMA bufs */ 352 APRINTK((buf->dmaaddr & ~0xFFFFFF00) == 0, 353 "bad dmaaddr: 0x%lx\n", 354 (unsigned long) buf->dmaaddr); 355 buf->ptr = buf->start; 356 buf->end = (u32 *) 357 (&((unsigned char *) buf->start)[size]); 358 memset(buf->start, 0, size); 359 break; 360 } 361 size /= 2; 362 } while (size >= minbytes); 363} 364 365/* size of buffer in bytes */ 366static inline size_t lanai_buf_size(const struct lanai_buffer *buf) 367{ 368 return ((unsigned long) buf->end) - ((unsigned long) buf->start); 369} 370 371static void lanai_buf_deallocate(struct lanai_buffer *buf, 372 struct pci_dev *pci) 373{ 374 if (buf->start != NULL) { 375 pci_free_consistent(pci, lanai_buf_size(buf), 376 buf->start, buf->dmaaddr); 377 buf->start = buf->end = buf->ptr = NULL; 378 } 379} 380 381/* size of buffer as "card order" (0=1k .. 7=128k) */ 382static int lanai_buf_size_cardorder(const struct lanai_buffer *buf) 383{ 384 int order = get_order(lanai_buf_size(buf)) + (PAGE_SHIFT - 10); 385 386 /* This can only happen if PAGE_SIZE is gigantic, but just in case */ 387 if (order > 7) 388 order = 7; 389 return order; 390} 391 392/* -------------------- PORT I/O UTILITIES: */ 393 394/* Registers (and their bit-fields) */ 395enum lanai_register { 396 Reset_Reg = 0x00, /* Reset; read for chip type; bits: */ 397#define RESET_GET_BOARD_REV(x) (((x)>> 0)&0x03) /* Board revision */ 398#define RESET_GET_BOARD_ID(x) (((x)>> 2)&0x03) /* Board ID */ 399#define BOARD_ID_LANAI256 (0) /* 25.6M adapter card */ 400 Endian_Reg = 0x04, /* Endian setting */ 401 IntStatus_Reg = 0x08, /* Interrupt status */ 402 IntStatusMasked_Reg = 0x0C, /* Interrupt status (masked) */ 403 IntAck_Reg = 0x10, /* Interrupt acknowledge */ 404 IntAckMasked_Reg = 0x14, /* Interrupt acknowledge (masked) */ 405 IntStatusSet_Reg = 0x18, /* Get status + enable/disable */ 406 IntStatusSetMasked_Reg = 0x1C, /* Get status + en/di (masked) */ 407 IntControlEna_Reg = 0x20, /* Interrupt control enable */ 408 IntControlDis_Reg = 0x24, /* Interrupt control disable */ 409 Status_Reg = 0x28, /* Status */ 410#define STATUS_PROMDATA (0x00000001) /* PROM_DATA pin */ 411#define STATUS_WAITING (0x00000002) /* Interrupt being delayed */ 412#define STATUS_SOOL (0x00000004) /* SOOL alarm */ 413#define STATUS_LOCD (0x00000008) /* LOCD alarm */ 414#define STATUS_LED (0x00000010) /* LED (HAPPI) output */ 415#define STATUS_GPIN (0x00000020) /* GPIN pin */ 416#define STATUS_BUTTBUSY (0x00000040) /* Butt register is pending */ 417 Config1_Reg = 0x2C, /* Config word 1; bits: */ 418#define CONFIG1_PROMDATA (0x00000001) /* PROM_DATA pin */ 419#define CONFIG1_PROMCLK (0x00000002) /* PROM_CLK pin */ 420#define CONFIG1_SET_READMODE(x) ((x)*0x004) /* PCI BM reads; values: */ 421#define READMODE_PLAIN (0) /* Plain memory read */ 422#define READMODE_LINE (2) /* Memory read line */ 423#define READMODE_MULTIPLE (3) /* Memory read multiple */ 424#define CONFIG1_DMA_ENABLE (0x00000010) /* Turn on DMA */ 425#define CONFIG1_POWERDOWN (0x00000020) /* Turn off clocks */ 426#define CONFIG1_SET_LOOPMODE(x) ((x)*0x080) /* Clock&loop mode; values: */ 427#define LOOPMODE_NORMAL (0) /* Normal - no loop */ 428#define LOOPMODE_TIME (1) 429#define LOOPMODE_DIAG (2) 430#define LOOPMODE_LINE (3) 431#define CONFIG1_MASK_LOOPMODE (0x00000180) 432#define CONFIG1_SET_LEDMODE(x) ((x)*0x0200) /* Mode of LED; values: */ 433#define LEDMODE_NOT_SOOL (0) /* !SOOL */ 434#define LEDMODE_OFF (1) /* 0 */ 435#define LEDMODE_ON (2) /* 1 */ 436#define LEDMODE_NOT_LOCD (3) /* !LOCD */ 437#define LEDMORE_GPIN (4) /* GPIN */ 438#define LEDMODE_NOT_GPIN (7) /* !GPIN */ 439#define CONFIG1_MASK_LEDMODE (0x00000E00) 440#define CONFIG1_GPOUT1 (0x00001000) /* Toggle for reset */ 441#define CONFIG1_GPOUT2 (0x00002000) /* Loopback PHY */ 442#define CONFIG1_GPOUT3 (0x00004000) /* Loopback lanai */ 443 Config2_Reg = 0x30, /* Config word 2; bits: */ 444#define CONFIG2_HOWMANY (0x00000001) /* >512 VCIs? */ 445#define CONFIG2_PTI7_MODE (0x00000002) /* Make PTI=7 RM, not OAM */ 446#define CONFIG2_VPI_CHK_DIS (0x00000004) /* Ignore RX VPI value */ 447#define CONFIG2_HEC_DROP (0x00000008) /* Drop cells w/ HEC errors */ 448#define CONFIG2_VCI0_NORMAL (0x00000010) /* Treat VCI=0 normally */ 449#define CONFIG2_CBR_ENABLE (0x00000020) /* Deal with CBR traffic */ 450#define CONFIG2_TRASH_ALL (0x00000040) /* Trashing incoming cells */ 451#define CONFIG2_TX_DISABLE (0x00000080) /* Trashing outgoing cells */ 452#define CONFIG2_SET_TRASH (0x00000100) /* Turn trashing on */ 453 Statistics_Reg = 0x34, /* Statistics; bits: */ 454#define STATS_GET_FIFO_OVFL(x) (((x)>> 0)&0xFF) /* FIFO overflowed */ 455#define STATS_GET_HEC_ERR(x) (((x)>> 8)&0xFF) /* HEC was bad */ 456#define STATS_GET_BAD_VCI(x) (((x)>>16)&0xFF) /* VCI not open */ 457#define STATS_GET_BUF_OVFL(x) (((x)>>24)&0xFF) /* VCC buffer full */ 458 ServiceStuff_Reg = 0x38, /* Service stuff; bits: */ 459#define SSTUFF_SET_SIZE(x) ((x)*0x20000000) /* size of service buffer */ 460#define SSTUFF_SET_ADDR(x) ((x)>>8) /* set address of buffer */ 461 ServWrite_Reg = 0x3C, /* ServWrite Pointer */ 462 ServRead_Reg = 0x40, /* ServRead Pointer */ 463 TxDepth_Reg = 0x44, /* FIFO Transmit Depth */ 464 Butt_Reg = 0x48, /* Butt register */ 465 CBR_ICG_Reg = 0x50, 466 CBR_PTR_Reg = 0x54, 467 PingCount_Reg = 0x58, /* Ping count */ 468 DMA_Addr_Reg = 0x5C /* DMA address */ 469}; 470 471static inline bus_addr_t reg_addr(const struct lanai_dev *lanai, 472 enum lanai_register reg) 473{ 474 return lanai->base + reg; 475} 476 477static inline u32 reg_read(const struct lanai_dev *lanai, 478 enum lanai_register reg) 479{ 480 u32 t; 481 t = readl(reg_addr(lanai, reg)); 482 RWDEBUG("R [0x%08X] 0x%02X = 0x%08X\n", (unsigned int) lanai->base, 483 (int) reg, t); 484 return t; 485} 486 487static inline void reg_write(const struct lanai_dev *lanai, u32 val, 488 enum lanai_register reg) 489{ 490 RWDEBUG("W [0x%08X] 0x%02X < 0x%08X\n", (unsigned int) lanai->base, 491 (int) reg, val); 492 writel(val, reg_addr(lanai, reg)); 493} 494 495static inline void conf1_write(const struct lanai_dev *lanai) 496{ 497 reg_write(lanai, lanai->conf1, Config1_Reg); 498} 499 500static inline void conf2_write(const struct lanai_dev *lanai) 501{ 502 reg_write(lanai, lanai->conf2, Config2_Reg); 503} 504 505/* Same as conf2_write(), but defers I/O if we're powered down */ 506static inline void conf2_write_if_powerup(const struct lanai_dev *lanai) 507{ 508#ifdef USE_POWERDOWN 509 if (unlikely((lanai->conf1 & CONFIG1_POWERDOWN) != 0)) 510 return; 511#endif /* USE_POWERDOWN */ 512 conf2_write(lanai); 513} 514 515static inline void reset_board(const struct lanai_dev *lanai) 516{ 517 DPRINTK("about to reset board\n"); 518 reg_write(lanai, 0, Reset_Reg); 519 /* 520 * If we don't delay a little while here then we can end up 521 * leaving the card in a VERY weird state and lock up the 522 * PCI bus. This isn't documented anywhere but I've convinced 523 * myself after a lot of painful experimentation 524 */ 525 udelay(5); 526} 527 528/* -------------------- CARD SRAM UTILITIES: */ 529 530/* The SRAM is mapped into normal PCI memory space - the only catch is 531 * that it is only 16-bits wide but must be accessed as 32-bit. The 532 * 16 high bits will be zero. We don't hide this, since they get 533 * programmed mostly like discrete registers anyway 534 */ 535#define SRAM_START (0x20000) 536#define SRAM_BYTES (0x20000) /* Again, half don't really exist */ 537 538static inline bus_addr_t sram_addr(const struct lanai_dev *lanai, int offset) 539{ 540 return lanai->base + SRAM_START + offset; 541} 542 543static inline u32 sram_read(const struct lanai_dev *lanai, int offset) 544{ 545 return readl(sram_addr(lanai, offset)); 546} 547 548static inline void sram_write(const struct lanai_dev *lanai, 549 u32 val, int offset) 550{ 551 writel(val, sram_addr(lanai, offset)); 552} 553 554static int __devinit sram_test_word(const struct lanai_dev *lanai, 555 int offset, u32 pattern) 556{ 557 u32 readback; 558 sram_write(lanai, pattern, offset); 559 readback = sram_read(lanai, offset); 560 if (likely(readback == pattern)) 561 return 0; 562 printk(KERN_ERR DEV_LABEL 563 "(itf %d): SRAM word at %d bad: wrote 0x%X, read 0x%X\n", 564 lanai->number, offset, 565 (unsigned int) pattern, (unsigned int) readback); 566 return -EIO; 567} 568 569static int __devinit sram_test_pass(const struct lanai_dev *lanai, u32 pattern) 570{ 571 int offset, result = 0; 572 for (offset = 0; offset < SRAM_BYTES && result == 0; offset += 4) 573 result = sram_test_word(lanai, offset, pattern); 574 return result; 575} 576 577static int __devinit sram_test_and_clear(const struct lanai_dev *lanai) 578{ 579#ifdef FULL_MEMORY_TEST 580 int result; 581 DPRINTK("testing SRAM\n"); 582 if ((result = sram_test_pass(lanai, 0x5555)) != 0) 583 return result; 584 if ((result = sram_test_pass(lanai, 0xAAAA)) != 0) 585 return result; 586#endif 587 DPRINTK("clearing SRAM\n"); 588 return sram_test_pass(lanai, 0x0000); 589} 590 591/* -------------------- CARD-BASED VCC TABLE UTILITIES: */ 592 593/* vcc table */ 594enum lanai_vcc_offset { 595 vcc_rxaddr1 = 0x00, /* Location1, plus bits: */ 596#define RXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of RX buffer */ 597#define RXADDR1_SET_RMMODE(x) ((x)*0x00800) /* RM cell action; values: */ 598#define RMMODE_TRASH (0) /* discard */ 599#define RMMODE_PRESERVE (1) /* input as AAL0 */ 600#define RMMODE_PIPE (2) /* pipe to coscheduler */ 601#define RMMODE_PIPEALL (3) /* pipe non-RM too */ 602#define RXADDR1_OAM_PRESERVE (0x00002000) /* Input OAM cells as AAL0 */ 603#define RXADDR1_SET_MODE(x) ((x)*0x0004000) /* Reassembly mode */ 604#define RXMODE_TRASH (0) /* discard */ 605#define RXMODE_AAL0 (1) /* non-AAL5 mode */ 606#define RXMODE_AAL5 (2) /* AAL5, intr. each PDU */ 607#define RXMODE_AAL5_STREAM (3) /* AAL5 w/o per-PDU intr */ 608 vcc_rxaddr2 = 0x04, /* Location2 */ 609 vcc_rxcrc1 = 0x08, /* RX CRC claculation space */ 610 vcc_rxcrc2 = 0x0C, 611 vcc_rxwriteptr = 0x10, /* RX writeptr, plus bits: */ 612#define RXWRITEPTR_LASTEFCI (0x00002000) /* Last PDU had EFCI bit */ 613#define RXWRITEPTR_DROPPING (0x00004000) /* Had error, dropping */ 614#define RXWRITEPTR_TRASHING (0x00008000) /* Trashing */ 615 vcc_rxbufstart = 0x14, /* RX bufstart, plus bits: */ 616#define RXBUFSTART_CLP (0x00004000) 617#define RXBUFSTART_CI (0x00008000) 618 vcc_rxreadptr = 0x18, /* RX readptr */ 619 vcc_txicg = 0x1C, /* TX ICG */ 620 vcc_txaddr1 = 0x20, /* Location1, plus bits: */ 621#define TXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of TX buffer */ 622#define TXADDR1_ABR (0x00008000) /* use ABR (doesn't work) */ 623 vcc_txaddr2 = 0x24, /* Location2 */ 624 vcc_txcrc1 = 0x28, /* TX CRC claculation space */ 625 vcc_txcrc2 = 0x2C, 626 vcc_txreadptr = 0x30, /* TX Readptr, plus bits: */ 627#define TXREADPTR_GET_PTR(x) ((x)&0x01FFF) 628#define TXREADPTR_MASK_DELTA (0x0000E000) /* ? */ 629 vcc_txendptr = 0x34, /* TX Endptr, plus bits: */ 630#define TXENDPTR_CLP (0x00002000) 631#define TXENDPTR_MASK_PDUMODE (0x0000C000) /* PDU mode; values: */ 632#define PDUMODE_AAL0 (0*0x04000) 633#define PDUMODE_AAL5 (2*0x04000) 634#define PDUMODE_AAL5STREAM (3*0x04000) 635 vcc_txwriteptr = 0x38, /* TX Writeptr */ 636#define TXWRITEPTR_GET_PTR(x) ((x)&0x1FFF) 637 vcc_txcbr_next = 0x3C /* # of next CBR VCI in ring */ 638#define TXCBR_NEXT_BOZO (0x00008000) /* "bozo bit" */ 639}; 640 641#define CARDVCC_SIZE (0x40) 642 643static inline bus_addr_t cardvcc_addr(const struct lanai_dev *lanai, 644 vci_t vci) 645{ 646 return sram_addr(lanai, vci * CARDVCC_SIZE); 647} 648 649static inline u32 cardvcc_read(const struct lanai_vcc *lvcc, 650 enum lanai_vcc_offset offset) 651{ 652 u32 val; 653 APRINTK(lvcc->vbase != NULL, "cardvcc_read: unbound vcc!\n"); 654 val= readl(lvcc->vbase + offset); 655 RWDEBUG("VR vci=%04d 0x%02X = 0x%08X\n", 656 lvcc->vci, (int) offset, val); 657 return val; 658} 659 660static inline void cardvcc_write(const struct lanai_vcc *lvcc, 661 u32 val, enum lanai_vcc_offset offset) 662{ 663 APRINTK(lvcc->vbase != NULL, "cardvcc_write: unbound vcc!\n"); 664 APRINTK((val & ~0xFFFF) == 0, 665 "cardvcc_write: bad val 0x%X (vci=%d, addr=0x%02X)\n", 666 (unsigned int) val, lvcc->vci, (unsigned int) offset); 667 RWDEBUG("VW vci=%04d 0x%02X > 0x%08X\n", 668 lvcc->vci, (unsigned int) offset, (unsigned int) val); 669 writel(val, lvcc->vbase + offset); 670} 671 672/* -------------------- COMPUTE SIZE OF AN AAL5 PDU: */ 673 674/* How many bytes will an AAL5 PDU take to transmit - remember that: 675 * o we need to add 8 bytes for length, CPI, UU, and CRC 676 * o we need to round up to 48 bytes for cells 677 */ 678static inline int aal5_size(int size) 679{ 680 int cells = (size + 8 + 47) / 48; 681 return cells * 48; 682} 683 684/* How many bytes can we send if we have "space" space, assuming we have 685 * to send full cells 686 */ 687static inline int aal5_spacefor(int space) 688{ 689 int cells = space / 48; 690 return cells * 48; 691} 692 693/* -------------------- FREE AN ATM SKB: */ 694 695static inline void lanai_free_skb(struct atm_vcc *atmvcc, struct sk_buff *skb) 696{ 697 if (atmvcc->pop != NULL) 698 atmvcc->pop(atmvcc, skb); 699 else 700 dev_kfree_skb_any(skb); 701} 702 703/* -------------------- TURN VCCS ON AND OFF: */ 704 705static void host_vcc_start_rx(const struct lanai_vcc *lvcc) 706{ 707 u32 addr1; 708 if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5) { 709 dma_addr_t dmaaddr = lvcc->rx.buf.dmaaddr; 710 cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc1); 711 cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc2); 712 cardvcc_write(lvcc, 0, vcc_rxwriteptr); 713 cardvcc_write(lvcc, 0, vcc_rxbufstart); 714 cardvcc_write(lvcc, 0, vcc_rxreadptr); 715 cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_rxaddr2); 716 addr1 = ((dmaaddr >> 8) & 0xFF) | 717 RXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->rx.buf))| 718 RXADDR1_SET_RMMODE(RMMODE_TRASH) | /* ??? */ 719 /* RXADDR1_OAM_PRESERVE | --- no OAM support yet */ 720 RXADDR1_SET_MODE(RXMODE_AAL5); 721 } else 722 addr1 = RXADDR1_SET_RMMODE(RMMODE_PRESERVE) | /* ??? */ 723 RXADDR1_OAM_PRESERVE | /* ??? */ 724 RXADDR1_SET_MODE(RXMODE_AAL0); 725 /* This one must be last! */ 726 cardvcc_write(lvcc, addr1, vcc_rxaddr1); 727} 728 729static void host_vcc_start_tx(const struct lanai_vcc *lvcc) 730{ 731 dma_addr_t dmaaddr = lvcc->tx.buf.dmaaddr; 732 cardvcc_write(lvcc, 0, vcc_txicg); 733 cardvcc_write(lvcc, 0xFFFF, vcc_txcrc1); 734 cardvcc_write(lvcc, 0xFFFF, vcc_txcrc2); 735 cardvcc_write(lvcc, 0, vcc_txreadptr); 736 cardvcc_write(lvcc, 0, vcc_txendptr); 737 cardvcc_write(lvcc, 0, vcc_txwriteptr); 738 cardvcc_write(lvcc, 739 (lvcc->tx.atmvcc->qos.txtp.traffic_class == ATM_CBR) ? 740 TXCBR_NEXT_BOZO | lvcc->vci : 0, vcc_txcbr_next); 741 cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_txaddr2); 742 cardvcc_write(lvcc, 743 ((dmaaddr >> 8) & 0xFF) | 744 TXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->tx.buf)), 745 vcc_txaddr1); 746} 747 748/* Shutdown receiving on card */ 749static void lanai_shutdown_rx_vci(const struct lanai_vcc *lvcc) 750{ 751 if (lvcc->vbase == NULL) /* We were never bound to a VCI */ 752 return; 753 /* 15.1.1 - set to trashing, wait one cell time (15us) */ 754 cardvcc_write(lvcc, 755 RXADDR1_SET_RMMODE(RMMODE_TRASH) | 756 RXADDR1_SET_MODE(RXMODE_TRASH), vcc_rxaddr1); 757 udelay(15); 758 /* 15.1.2 - clear rest of entries */ 759 cardvcc_write(lvcc, 0, vcc_rxaddr2); 760 cardvcc_write(lvcc, 0, vcc_rxcrc1); 761 cardvcc_write(lvcc, 0, vcc_rxcrc2); 762 cardvcc_write(lvcc, 0, vcc_rxwriteptr); 763 cardvcc_write(lvcc, 0, vcc_rxbufstart); 764 cardvcc_write(lvcc, 0, vcc_rxreadptr); 765} 766 767/* Shutdown transmitting on card. 768 * Unfortunately the lanai needs us to wait until all the data 769 * drains out of the buffer before we can dealloc it, so this 770 * can take awhile -- up to 370ms for a full 128KB buffer 771 * assuming everone else is quiet. In theory the time is 772 * boundless if there's a CBR VCC holding things up. 773 */ 774static void lanai_shutdown_tx_vci(struct lanai_dev *lanai, 775 struct lanai_vcc *lvcc) 776{ 777 struct sk_buff *skb; 778 unsigned long flags, timeout; 779 int read, write, lastread = -1; 780 APRINTK(!in_interrupt(), 781 "lanai_shutdown_tx_vci called w/o process context!\n"); 782 if (lvcc->vbase == NULL) /* We were never bound to a VCI */ 783 return; 784 /* 15.2.1 - wait for queue to drain */ 785 while ((skb = skb_dequeue(&lvcc->tx.backlog)) != NULL) 786 lanai_free_skb(lvcc->tx.atmvcc, skb); 787 read_lock_irqsave(&vcc_sklist_lock, flags); 788 __clear_bit(lvcc->vci, lanai->backlog_vccs); 789 read_unlock_irqrestore(&vcc_sklist_lock, flags); 790 /* 791 * We need to wait for the VCC to drain but don't wait forever. We 792 * give each 1K of buffer size 1/128th of a second to clear out. 793 * TODO: maybe disable CBR if we're about to timeout? 794 */ 795 timeout = jiffies + 796 (((lanai_buf_size(&lvcc->tx.buf) / 1024) * HZ) >> 7); 797 write = TXWRITEPTR_GET_PTR(cardvcc_read(lvcc, vcc_txwriteptr)); 798 for (;;) { 799 read = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr)); 800 if (read == write && /* Is TX buffer empty? */ 801 (lvcc->tx.atmvcc->qos.txtp.traffic_class != ATM_CBR || 802 (cardvcc_read(lvcc, vcc_txcbr_next) & 803 TXCBR_NEXT_BOZO) == 0)) 804 break; 805 if (read != lastread) { /* Has there been any progress? */ 806 lastread = read; 807 timeout += HZ / 10; 808 } 809 if (unlikely(time_after(jiffies, timeout))) { 810 printk(KERN_ERR DEV_LABEL "(itf %d): Timed out on " 811 "backlog closing vci %d\n", 812 lvcc->tx.atmvcc->dev->number, lvcc->vci); 813 DPRINTK("read, write = %d, %d\n", read, write); 814 break; 815 } 816 msleep(40); 817 } 818 /* 15.2.2 - clear out all tx registers */ 819 cardvcc_write(lvcc, 0, vcc_txreadptr); 820 cardvcc_write(lvcc, 0, vcc_txwriteptr); 821 cardvcc_write(lvcc, 0, vcc_txendptr); 822 cardvcc_write(lvcc, 0, vcc_txcrc1); 823 cardvcc_write(lvcc, 0, vcc_txcrc2); 824 cardvcc_write(lvcc, 0, vcc_txaddr2); 825 cardvcc_write(lvcc, 0, vcc_txaddr1); 826} 827 828/* -------------------- MANAGING AAL0 RX BUFFER: */ 829 830static inline int aal0_buffer_allocate(struct lanai_dev *lanai) 831{ 832 DPRINTK("aal0_buffer_allocate: allocating AAL0 RX buffer\n"); 833 lanai_buf_allocate(&lanai->aal0buf, AAL0_RX_BUFFER_SIZE, 80, 834 lanai->pci); 835 return (lanai->aal0buf.start == NULL) ? -ENOMEM : 0; 836} 837 838static inline void aal0_buffer_free(struct lanai_dev *lanai) 839{ 840 DPRINTK("aal0_buffer_allocate: freeing AAL0 RX buffer\n"); 841 lanai_buf_deallocate(&lanai->aal0buf, lanai->pci); 842} 843 844/* -------------------- EEPROM UTILITIES: */ 845 846/* Offsets of data in the EEPROM */ 847#define EEPROM_COPYRIGHT (0) 848#define EEPROM_COPYRIGHT_LEN (44) 849#define EEPROM_CHECKSUM (62) 850#define EEPROM_CHECKSUM_REV (63) 851#define EEPROM_MAC (64) 852#define EEPROM_MAC_REV (70) 853#define EEPROM_SERIAL (112) 854#define EEPROM_SERIAL_REV (116) 855#define EEPROM_MAGIC (120) 856#define EEPROM_MAGIC_REV (124) 857 858#define EEPROM_MAGIC_VALUE (0x5AB478D2) 859 860#ifndef READ_EEPROM 861 862/* Stub functions to use if EEPROM reading is disabled */ 863static int __devinit eeprom_read(struct lanai_dev *lanai) 864{ 865 printk(KERN_INFO DEV_LABEL "(itf %d): *NOT* reading EEPROM\n", 866 lanai->number); 867 memset(&lanai->eeprom[EEPROM_MAC], 0, 6); 868 return 0; 869} 870 871static int __devinit eeprom_validate(struct lanai_dev *lanai) 872{ 873 lanai->serialno = 0; 874 lanai->magicno = EEPROM_MAGIC_VALUE; 875 return 0; 876} 877 878#else /* READ_EEPROM */ 879 880static int __devinit eeprom_read(struct lanai_dev *lanai) 881{ 882 int i, address; 883 u8 data; 884 u32 tmp; 885#define set_config1(x) do { lanai->conf1 = x; conf1_write(lanai); \ 886 } while (0) 887#define clock_h() set_config1(lanai->conf1 | CONFIG1_PROMCLK) 888#define clock_l() set_config1(lanai->conf1 &~ CONFIG1_PROMCLK) 889#define data_h() set_config1(lanai->conf1 | CONFIG1_PROMDATA) 890#define data_l() set_config1(lanai->conf1 &~ CONFIG1_PROMDATA) 891#define pre_read() do { data_h(); clock_h(); udelay(5); } while (0) 892#define read_pin() (reg_read(lanai, Status_Reg) & STATUS_PROMDATA) 893#define send_stop() do { data_l(); udelay(5); clock_h(); udelay(5); \ 894 data_h(); udelay(5); } while (0) 895 /* start with both clock and data high */ 896 data_h(); clock_h(); udelay(5); 897 for (address = 0; address < LANAI_EEPROM_SIZE; address++) { 898 data = (address << 1) | 1; /* Command=read + address */ 899 /* send start bit */ 900 data_l(); udelay(5); 901 clock_l(); udelay(5); 902 for (i = 128; i != 0; i >>= 1) { /* write command out */ 903 tmp = (lanai->conf1 & ~CONFIG1_PROMDATA) | 904 ((data & i) ? CONFIG1_PROMDATA : 0); 905 if (lanai->conf1 != tmp) { 906 set_config1(tmp); 907 udelay(5); /* Let new data settle */ 908 } 909 clock_h(); udelay(5); clock_l(); udelay(5); 910 } 911 /* look for ack */ 912 data_h(); clock_h(); udelay(5); 913 if (read_pin() != 0) 914 goto error; /* No ack seen */ 915 clock_l(); udelay(5); 916 /* read back result */ 917 for (data = 0, i = 7; i >= 0; i--) { 918 data_h(); clock_h(); udelay(5); 919 data = (data << 1) | !!read_pin(); 920 clock_l(); udelay(5); 921 } 922 /* look again for ack */ 923 data_h(); clock_h(); udelay(5); 924 if (read_pin() == 0) 925 goto error; /* Spurious ack */ 926 clock_l(); udelay(5); 927 send_stop(); 928 lanai->eeprom[address] = data; 929 DPRINTK("EEPROM 0x%04X %02X\n", 930 (unsigned int) address, (unsigned int) data); 931 } 932 return 0; 933 error: 934 clock_l(); udelay(5); /* finish read */ 935 send_stop(); 936 printk(KERN_ERR DEV_LABEL "(itf %d): error reading EEPROM byte %d\n", 937 lanai->number, address); 938 return -EIO; 939#undef set_config1 940#undef clock_h 941#undef clock_l 942#undef data_h 943#undef data_l 944#undef pre_read 945#undef read_pin 946#undef send_stop 947} 948 949/* read a big-endian 4-byte value out of eeprom */ 950static inline u32 eeprom_be4(const struct lanai_dev *lanai, int address) 951{ 952 return be32_to_cpup((const u32 *) &lanai->eeprom[address]); 953} 954 955/* Checksum/validate EEPROM contents */ 956static int __devinit eeprom_validate(struct lanai_dev *lanai) 957{ 958 int i, s; 959 u32 v; 960 const u8 *e = lanai->eeprom; 961#ifdef DEBUG 962 /* First, see if we can get an ASCIIZ string out of the copyright */ 963 for (i = EEPROM_COPYRIGHT; 964 i < (EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN); i++) 965 if (e[i] < 0x20 || e[i] > 0x7E) 966 break; 967 if ( i != EEPROM_COPYRIGHT && 968 i != EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN && e[i] == '\0') 969 DPRINTK("eeprom: copyright = \"%s\"\n", 970 (char *) &e[EEPROM_COPYRIGHT]); 971 else 972 DPRINTK("eeprom: copyright not found\n"); 973#endif 974 /* Validate checksum */ 975 for (i = s = 0; i < EEPROM_CHECKSUM; i++) 976 s += e[i]; 977 s &= 0xFF; 978 if (s != e[EEPROM_CHECKSUM]) { 979 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM checksum bad " 980 "(wanted 0x%02X, got 0x%02X)\n", lanai->number, 981 (unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM]); 982 return -EIO; 983 } 984 s ^= 0xFF; 985 if (s != e[EEPROM_CHECKSUM_REV]) { 986 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM inverse checksum " 987 "bad (wanted 0x%02X, got 0x%02X)\n", lanai->number, 988 (unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM_REV]); 989 return -EIO; 990 } 991 /* Verify MAC address */ 992 for (i = 0; i < 6; i++) 993 if ((e[EEPROM_MAC + i] ^ e[EEPROM_MAC_REV + i]) != 0xFF) { 994 printk(KERN_ERR DEV_LABEL 995 "(itf %d) : EEPROM MAC addresses don't match " 996 "(0x%02X, inverse 0x%02X)\n", lanai->number, 997 (unsigned int) e[EEPROM_MAC + i], 998 (unsigned int) e[EEPROM_MAC_REV + i]); 999 return -EIO; 1000 } 1001 DPRINTK("eeprom: MAC address = %02X:%02X:%02X:%02X:%02X:%02X\n", 1002 e[EEPROM_MAC + 0], e[EEPROM_MAC + 1], e[EEPROM_MAC + 2], 1003 e[EEPROM_MAC + 3], e[EEPROM_MAC + 4], e[EEPROM_MAC + 5]); 1004 /* Verify serial number */ 1005 lanai->serialno = eeprom_be4(lanai, EEPROM_SERIAL); 1006 v = eeprom_be4(lanai, EEPROM_SERIAL_REV); 1007 if ((lanai->serialno ^ v) != 0xFFFFFFFF) { 1008 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM serial numbers " 1009 "don't match (0x%08X, inverse 0x%08X)\n", lanai->number, 1010 (unsigned int) lanai->serialno, (unsigned int) v); 1011 return -EIO; 1012 } 1013 DPRINTK("eeprom: Serial number = %d\n", (unsigned int) lanai->serialno); 1014 /* Verify magic number */ 1015 lanai->magicno = eeprom_be4(lanai, EEPROM_MAGIC); 1016 v = eeprom_be4(lanai, EEPROM_MAGIC_REV); 1017 if ((lanai->magicno ^ v) != 0xFFFFFFFF) { 1018 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM magic numbers " 1019 "don't match (0x%08X, inverse 0x%08X)\n", lanai->number, 1020 lanai->magicno, v); 1021 return -EIO; 1022 } 1023 DPRINTK("eeprom: Magic number = 0x%08X\n", lanai->magicno); 1024 if (lanai->magicno != EEPROM_MAGIC_VALUE) 1025 printk(KERN_WARNING DEV_LABEL "(itf %d): warning - EEPROM " 1026 "magic not what expected (got 0x%08X, not 0x%08X)\n", 1027 lanai->number, (unsigned int) lanai->magicno, 1028 (unsigned int) EEPROM_MAGIC_VALUE); 1029 return 0; 1030} 1031 1032#endif /* READ_EEPROM */ 1033 1034static inline const u8 *eeprom_mac(const struct lanai_dev *lanai) 1035{ 1036 return &lanai->eeprom[EEPROM_MAC]; 1037} 1038 1039/* -------------------- INTERRUPT HANDLING UTILITIES: */ 1040 1041/* Interrupt types */ 1042#define INT_STATS (0x00000002) /* Statistics counter overflow */ 1043#define INT_SOOL (0x00000004) /* SOOL changed state */ 1044#define INT_LOCD (0x00000008) /* LOCD changed state */ 1045#define INT_LED (0x00000010) /* LED (HAPPI) changed state */ 1046#define INT_GPIN (0x00000020) /* GPIN changed state */ 1047#define INT_PING (0x00000040) /* PING_COUNT fulfilled */ 1048#define INT_WAKE (0x00000080) /* Lanai wants bus */ 1049#define INT_CBR0 (0x00000100) /* CBR sched hit VCI 0 */ 1050#define INT_LOCK (0x00000200) /* Service list overflow */ 1051#define INT_MISMATCH (0x00000400) /* TX magic list mismatch */ 1052#define INT_AAL0_STR (0x00000800) /* Non-AAL5 buffer half filled */ 1053#define INT_AAL0 (0x00001000) /* Non-AAL5 data available */ 1054#define INT_SERVICE (0x00002000) /* Service list entries available */ 1055#define INT_TABORTSENT (0x00004000) /* Target abort sent by lanai */ 1056#define INT_TABORTBM (0x00008000) /* Abort rcv'd as bus master */ 1057#define INT_TIMEOUTBM (0x00010000) /* No response to bus master */ 1058#define INT_PCIPARITY (0x00020000) /* Parity error on PCI */ 1059 1060/* Sets of the above */ 1061#define INT_ALL (0x0003FFFE) /* All interrupts */ 1062#define INT_STATUS (0x0000003C) /* Some status pin changed */ 1063#define INT_DMASHUT (0x00038000) /* DMA engine got shut down */ 1064#define INT_SEGSHUT (0x00000700) /* Segmentation got shut down */ 1065 1066static inline u32 intr_pending(const struct lanai_dev *lanai) 1067{ 1068 return reg_read(lanai, IntStatusMasked_Reg); 1069} 1070 1071static inline void intr_enable(const struct lanai_dev *lanai, u32 i) 1072{ 1073 reg_write(lanai, i, IntControlEna_Reg); 1074} 1075 1076static inline void intr_disable(const struct lanai_dev *lanai, u32 i) 1077{ 1078 reg_write(lanai, i, IntControlDis_Reg); 1079} 1080 1081/* -------------------- CARD/PCI STATUS: */ 1082 1083static void status_message(int itf, const char *name, int status) 1084{ 1085 static const char *onoff[2] = { "off to on", "on to off" }; 1086 printk(KERN_INFO DEV_LABEL "(itf %d): %s changed from %s\n", 1087 itf, name, onoff[!status]); 1088} 1089 1090static void lanai_check_status(struct lanai_dev *lanai) 1091{ 1092 u32 new = reg_read(lanai, Status_Reg); 1093 u32 changes = new ^ lanai->status; 1094 lanai->status = new; 1095#define e(flag, name) \ 1096 if (changes & flag) \ 1097 status_message(lanai->number, name, new & flag) 1098 e(STATUS_SOOL, "SOOL"); 1099 e(STATUS_LOCD, "LOCD"); 1100 e(STATUS_LED, "LED"); 1101 e(STATUS_GPIN, "GPIN"); 1102#undef e 1103} 1104 1105static void pcistatus_got(int itf, const char *name) 1106{ 1107 printk(KERN_INFO DEV_LABEL "(itf %d): PCI got %s error\n", itf, name); 1108} 1109 1110static void pcistatus_check(struct lanai_dev *lanai, int clearonly) 1111{ 1112 u16 s; 1113 int result; 1114 result = pci_read_config_word(lanai->pci, PCI_STATUS, &s); 1115 if (result != PCIBIOS_SUCCESSFUL) { 1116 printk(KERN_ERR DEV_LABEL "(itf %d): can't read PCI_STATUS: " 1117 "%d\n", lanai->number, result); 1118 return; 1119 } 1120 s &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 1121 PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT | 1122 PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_PARITY; 1123 if (s == 0) 1124 return; 1125 result = pci_write_config_word(lanai->pci, PCI_STATUS, s); 1126 if (result != PCIBIOS_SUCCESSFUL) 1127 printk(KERN_ERR DEV_LABEL "(itf %d): can't write PCI_STATUS: " 1128 "%d\n", lanai->number, result); 1129 if (clearonly) 1130 return; 1131#define e(flag, name, stat) \ 1132 if (s & flag) { \ 1133 pcistatus_got(lanai->number, name); \ 1134 ++lanai->stats.pcierr_##stat; \ 1135 } 1136 e(PCI_STATUS_DETECTED_PARITY, "parity", parity_detect); 1137 e(PCI_STATUS_SIG_SYSTEM_ERROR, "signalled system", serr_set); 1138 e(PCI_STATUS_REC_MASTER_ABORT, "master", master_abort); 1139 e(PCI_STATUS_REC_TARGET_ABORT, "master target", m_target_abort); 1140 e(PCI_STATUS_SIG_TARGET_ABORT, "slave", s_target_abort); 1141 e(PCI_STATUS_PARITY, "master parity", master_parity); 1142#undef e 1143} 1144 1145/* -------------------- VCC TX BUFFER UTILITIES: */ 1146 1147/* space left in tx buffer in bytes */ 1148static inline int vcc_tx_space(const struct lanai_vcc *lvcc, int endptr) 1149{ 1150 int r; 1151 r = endptr * 16; 1152 r -= ((unsigned long) lvcc->tx.buf.ptr) - 1153 ((unsigned long) lvcc->tx.buf.start); 1154 r -= 16; /* Leave "bubble" - if start==end it looks empty */ 1155 if (r < 0) 1156 r += lanai_buf_size(&lvcc->tx.buf); 1157 return r; 1158} 1159 1160/* test if VCC is currently backlogged */ 1161static inline int vcc_is_backlogged(const struct lanai_vcc *lvcc) 1162{ 1163 return !skb_queue_empty(&lvcc->tx.backlog); 1164} 1165 1166/* Bit fields in the segmentation buffer descriptor */ 1167#define DESCRIPTOR_MAGIC (0xD0000000) 1168#define DESCRIPTOR_AAL5 (0x00008000) 1169#define DESCRIPTOR_AAL5_STREAM (0x00004000) 1170#define DESCRIPTOR_CLP (0x00002000) 1171 1172/* Add 32-bit descriptor with its padding */ 1173static inline void vcc_tx_add_aal5_descriptor(struct lanai_vcc *lvcc, 1174 u32 flags, int len) 1175{ 1176 int pos; 1177 APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 0, 1178 "vcc_tx_add_aal5_descriptor: bad ptr=%p\n", lvcc->tx.buf.ptr); 1179 lvcc->tx.buf.ptr += 4; /* Hope the values REALLY don't matter */ 1180 pos = ((unsigned char *) lvcc->tx.buf.ptr) - 1181 (unsigned char *) lvcc->tx.buf.start; 1182 APRINTK((pos & ~0x0001FFF0) == 0, 1183 "vcc_tx_add_aal5_descriptor: bad pos (%d) before, vci=%d, " 1184 "start,ptr,end=%p,%p,%p\n", pos, lvcc->vci, 1185 lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end); 1186 pos = (pos + len) & (lanai_buf_size(&lvcc->tx.buf) - 1); 1187 APRINTK((pos & ~0x0001FFF0) == 0, 1188 "vcc_tx_add_aal5_descriptor: bad pos (%d) after, vci=%d, " 1189 "start,ptr,end=%p,%p,%p\n", pos, lvcc->vci, 1190 lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end); 1191 lvcc->tx.buf.ptr[-1] = 1192 cpu_to_le32(DESCRIPTOR_MAGIC | DESCRIPTOR_AAL5 | 1193 ((lvcc->tx.atmvcc->atm_options & ATM_ATMOPT_CLP) ? 1194 DESCRIPTOR_CLP : 0) | flags | pos >> 4); 1195 if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end) 1196 lvcc->tx.buf.ptr = lvcc->tx.buf.start; 1197} 1198 1199/* Add 32-bit AAL5 trailer and leave room for its CRC */ 1200static inline void vcc_tx_add_aal5_trailer(struct lanai_vcc *lvcc, 1201 int len, int cpi, int uu) 1202{ 1203 APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 8, 1204 "vcc_tx_add_aal5_trailer: bad ptr=%p\n", lvcc->tx.buf.ptr); 1205 lvcc->tx.buf.ptr += 2; 1206 lvcc->tx.buf.ptr[-2] = cpu_to_be32((uu << 24) | (cpi << 16) | len); 1207 if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end) 1208 lvcc->tx.buf.ptr = lvcc->tx.buf.start; 1209} 1210 1211static inline void vcc_tx_memcpy(struct lanai_vcc *lvcc, 1212 const unsigned char *src, int n) 1213{ 1214 unsigned char *e; 1215 int m; 1216 e = ((unsigned char *) lvcc->tx.buf.ptr) + n; 1217 m = e - (unsigned char *) lvcc->tx.buf.end; 1218 if (m < 0) 1219 m = 0; 1220 memcpy(lvcc->tx.buf.ptr, src, n - m); 1221 if (m != 0) { 1222 memcpy(lvcc->tx.buf.start, src + n - m, m); 1223 e = ((unsigned char *) lvcc->tx.buf.start) + m; 1224 } 1225 lvcc->tx.buf.ptr = (u32 *) e; 1226} 1227 1228static inline void vcc_tx_memzero(struct lanai_vcc *lvcc, int n) 1229{ 1230 unsigned char *e; 1231 int m; 1232 if (n == 0) 1233 return; 1234 e = ((unsigned char *) lvcc->tx.buf.ptr) + n; 1235 m = e - (unsigned char *) lvcc->tx.buf.end; 1236 if (m < 0) 1237 m = 0; 1238 memset(lvcc->tx.buf.ptr, 0, n - m); 1239 if (m != 0) { 1240 memset(lvcc->tx.buf.start, 0, m); 1241 e = ((unsigned char *) lvcc->tx.buf.start) + m; 1242 } 1243 lvcc->tx.buf.ptr = (u32 *) e; 1244} 1245 1246/* Update "butt" register to specify new WritePtr */ 1247static inline void lanai_endtx(struct lanai_dev *lanai, 1248 const struct lanai_vcc *lvcc) 1249{ 1250 int i, ptr = ((unsigned char *) lvcc->tx.buf.ptr) - 1251 (unsigned char *) lvcc->tx.buf.start; 1252 APRINTK((ptr & ~0x0001FFF0) == 0, 1253 "lanai_endtx: bad ptr (%d), vci=%d, start,ptr,end=%p,%p,%p\n", 1254 ptr, lvcc->vci, lvcc->tx.buf.start, lvcc->tx.buf.ptr, 1255 lvcc->tx.buf.end); 1256 1257 /* 1258 * Since the "butt register" is a shared resounce on the card we 1259 * serialize all accesses to it through this spinlock. This is 1260 * mostly just paranoia sicne the register is rarely "busy" anyway 1261 * but is needed for correctness. 1262 */ 1263 spin_lock(&lanai->endtxlock); 1264 /* 1265 * We need to check if the "butt busy" bit is set before 1266 * updating the butt register. In theory this should 1267 * never happen because the ATM card is plenty fast at 1268 * updating the register. Still, we should make sure 1269 */ 1270 for (i = 0; reg_read(lanai, Status_Reg) & STATUS_BUTTBUSY; i++) { 1271 if (unlikely(i > 50)) { 1272 printk(KERN_ERR DEV_LABEL "(itf %d): butt register " 1273 "always busy!\n", lanai->number); 1274 break; 1275 } 1276 udelay(5); 1277 } 1278 /* 1279 * Before we tall the card to start work we need to be sure 100% of 1280 * the info in the service buffer has been written before we tell 1281 * the card about it 1282 */ 1283 wmb(); 1284 reg_write(lanai, (ptr << 12) | lvcc->vci, Butt_Reg); 1285 spin_unlock(&lanai->endtxlock); 1286} 1287 1288/* 1289 * Add one AAL5 PDU to lvcc's transmit buffer. Caller garauntees there's 1290 * space available. "pdusize" is the number of bytes the PDU will take 1291 */ 1292static void lanai_send_one_aal5(struct lanai_dev *lanai, 1293 struct lanai_vcc *lvcc, struct sk_buff *skb, int pdusize) 1294{ 1295 int pad; 1296 APRINTK(pdusize == aal5_size(skb->len), 1297 "lanai_send_one_aal5: wrong size packet (%d != %d)\n", 1298 pdusize, aal5_size(skb->len)); 1299 vcc_tx_add_aal5_descriptor(lvcc, 0, pdusize); 1300 pad = pdusize - skb->len - 8; 1301 APRINTK(pad >= 0, "pad is negative (%d)\n", pad); 1302 APRINTK(pad < 48, "pad is too big (%d)\n", pad); 1303 vcc_tx_memcpy(lvcc, skb->data, skb->len); 1304 vcc_tx_memzero(lvcc, pad); 1305 vcc_tx_add_aal5_trailer(lvcc, skb->len, 0, 0); 1306 lanai_endtx(lanai, lvcc); 1307 lanai_free_skb(lvcc->tx.atmvcc, skb); 1308 atomic_inc(&lvcc->tx.atmvcc->stats->tx); 1309} 1310 1311/* Try to fill the buffer - don't call unless there is backlog */ 1312static void vcc_tx_unqueue_aal5(struct lanai_dev *lanai, 1313 struct lanai_vcc *lvcc, int endptr) 1314{ 1315 int n; 1316 struct sk_buff *skb; 1317 int space = vcc_tx_space(lvcc, endptr); 1318 APRINTK(vcc_is_backlogged(lvcc), 1319 "vcc_tx_unqueue() called with empty backlog (vci=%d)\n", 1320 lvcc->vci); 1321 while (space >= 64) { 1322 skb = skb_dequeue(&lvcc->tx.backlog); 1323 if (skb == NULL) 1324 goto no_backlog; 1325 n = aal5_size(skb->len); 1326 if (n + 16 > space) { 1327 /* No room for this packet - put it back on queue */ 1328 skb_queue_head(&lvcc->tx.backlog, skb); 1329 return; 1330 } 1331 lanai_send_one_aal5(lanai, lvcc, skb, n); 1332 space -= n + 16; 1333 } 1334 if (!vcc_is_backlogged(lvcc)) { 1335 no_backlog: 1336 __clear_bit(lvcc->vci, lanai->backlog_vccs); 1337 } 1338} 1339 1340/* Given an skb that we want to transmit either send it now or queue */ 1341static void vcc_tx_aal5(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1342 struct sk_buff *skb) 1343{ 1344 int space, n; 1345 if (vcc_is_backlogged(lvcc)) /* Already backlogged */ 1346 goto queue_it; 1347 space = vcc_tx_space(lvcc, 1348 TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr))); 1349 n = aal5_size(skb->len); 1350 APRINTK(n + 16 >= 64, "vcc_tx_aal5: n too small (%d)\n", n); 1351 if (space < n + 16) { /* No space for this PDU */ 1352 __set_bit(lvcc->vci, lanai->backlog_vccs); 1353 queue_it: 1354 skb_queue_tail(&lvcc->tx.backlog, skb); 1355 return; 1356 } 1357 lanai_send_one_aal5(lanai, lvcc, skb, n); 1358} 1359 1360static void vcc_tx_unqueue_aal0(struct lanai_dev *lanai, 1361 struct lanai_vcc *lvcc, int endptr) 1362{ 1363 printk(KERN_INFO DEV_LABEL 1364 ": vcc_tx_unqueue_aal0: not implemented\n"); 1365} 1366 1367static void vcc_tx_aal0(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1368 struct sk_buff *skb) 1369{ 1370 printk(KERN_INFO DEV_LABEL ": vcc_tx_aal0: not implemented\n"); 1371 /* Remember to increment lvcc->tx.atmvcc->stats->tx */ 1372 lanai_free_skb(lvcc->tx.atmvcc, skb); 1373} 1374 1375/* -------------------- VCC RX BUFFER UTILITIES: */ 1376 1377/* unlike the _tx_ cousins, this doesn't update ptr */ 1378static inline void vcc_rx_memcpy(unsigned char *dest, 1379 const struct lanai_vcc *lvcc, int n) 1380{ 1381 int m = ((const unsigned char *) lvcc->rx.buf.ptr) + n - 1382 ((const unsigned char *) (lvcc->rx.buf.end)); 1383 if (m < 0) 1384 m = 0; 1385 memcpy(dest, lvcc->rx.buf.ptr, n - m); 1386 memcpy(dest + n - m, lvcc->rx.buf.start, m); 1387 /* Make sure that these copies don't get reordered */ 1388 barrier(); 1389} 1390 1391/* Receive AAL5 data on a VCC with a particular endptr */ 1392static void vcc_rx_aal5(struct lanai_vcc *lvcc, int endptr) 1393{ 1394 int size; 1395 struct sk_buff *skb; 1396 const u32 *x; 1397 u32 *end = &lvcc->rx.buf.start[endptr * 4]; 1398 int n = ((unsigned long) end) - ((unsigned long) lvcc->rx.buf.ptr); 1399 if (n < 0) 1400 n += lanai_buf_size(&lvcc->rx.buf); 1401 APRINTK(n >= 0 && n < lanai_buf_size(&lvcc->rx.buf) && !(n & 15), 1402 "vcc_rx_aal5: n out of range (%d/%Zu)\n", 1403 n, lanai_buf_size(&lvcc->rx.buf)); 1404 /* Recover the second-to-last word to get true pdu length */ 1405 if ((x = &end[-2]) < lvcc->rx.buf.start) 1406 x = &lvcc->rx.buf.end[-2]; 1407 /* 1408 * Before we actually read from the buffer, make sure the memory 1409 * changes have arrived 1410 */ 1411 rmb(); 1412 size = be32_to_cpup(x) & 0xffff; 1413 if (unlikely(n != aal5_size(size))) { 1414 /* Make sure size matches padding */ 1415 printk(KERN_INFO DEV_LABEL "(itf %d): Got bad AAL5 length " 1416 "on vci=%d - size=%d n=%d\n", 1417 lvcc->rx.atmvcc->dev->number, lvcc->vci, size, n); 1418 lvcc->stats.x.aal5.rx_badlen++; 1419 goto out; 1420 } 1421 skb = atm_alloc_charge(lvcc->rx.atmvcc, size, GFP_ATOMIC); 1422 if (unlikely(skb == NULL)) { 1423 lvcc->stats.rx_nomem++; 1424 goto out; 1425 } 1426 skb_put(skb, size); 1427 vcc_rx_memcpy(skb->data, lvcc, size); 1428 ATM_SKB(skb)->vcc = lvcc->rx.atmvcc; 1429 __net_timestamp(skb); 1430 lvcc->rx.atmvcc->push(lvcc->rx.atmvcc, skb); 1431 atomic_inc(&lvcc->rx.atmvcc->stats->rx); 1432 out: 1433 lvcc->rx.buf.ptr = end; 1434 cardvcc_write(lvcc, endptr, vcc_rxreadptr); 1435} 1436 1437static void vcc_rx_aal0(struct lanai_dev *lanai) 1438{ 1439 printk(KERN_INFO DEV_LABEL ": vcc_rx_aal0: not implemented\n"); 1440 /* Remember to get read_lock(&vcc_sklist_lock) while looking up VC */ 1441 /* Remember to increment lvcc->rx.atmvcc->stats->rx */ 1442} 1443 1444/* -------------------- MANAGING HOST-BASED VCC TABLE: */ 1445 1446/* Decide whether to use vmalloc or get_zeroed_page for VCC table */ 1447#if (NUM_VCI * BITS_PER_LONG) <= PAGE_SIZE 1448#define VCCTABLE_GETFREEPAGE 1449#else 1450#include <linux/vmalloc.h> 1451#endif 1452 1453static int __devinit vcc_table_allocate(struct lanai_dev *lanai) 1454{ 1455#ifdef VCCTABLE_GETFREEPAGE 1456 APRINTK((lanai->num_vci) * sizeof(struct lanai_vcc *) <= PAGE_SIZE, 1457 "vcc table > PAGE_SIZE!"); 1458 lanai->vccs = (struct lanai_vcc **) get_zeroed_page(GFP_KERNEL); 1459 return (lanai->vccs == NULL) ? -ENOMEM : 0; 1460#else 1461 int bytes = (lanai->num_vci) * sizeof(struct lanai_vcc *); 1462 lanai->vccs = (struct lanai_vcc **) vmalloc(bytes); 1463 if (unlikely(lanai->vccs == NULL)) 1464 return -ENOMEM; 1465 memset(lanai->vccs, 0, bytes); 1466 return 0; 1467#endif 1468} 1469 1470static inline void vcc_table_deallocate(const struct lanai_dev *lanai) 1471{ 1472#ifdef VCCTABLE_GETFREEPAGE 1473 free_page((unsigned long) lanai->vccs); 1474#else 1475 vfree(lanai->vccs); 1476#endif 1477} 1478 1479/* Allocate a fresh lanai_vcc, with the appropriate things cleared */ 1480static inline struct lanai_vcc *new_lanai_vcc(void) 1481{ 1482 struct lanai_vcc *lvcc; 1483 lvcc = kzalloc(sizeof(*lvcc), GFP_KERNEL); 1484 if (likely(lvcc != NULL)) { 1485 skb_queue_head_init(&lvcc->tx.backlog); 1486#ifdef DEBUG 1487 lvcc->vci = -1; 1488#endif 1489 } 1490 return lvcc; 1491} 1492 1493static int lanai_get_sized_buffer(struct lanai_dev *lanai, 1494 struct lanai_buffer *buf, int max_sdu, int multiplier, 1495 const char *name) 1496{ 1497 int size; 1498 if (unlikely(max_sdu < 1)) 1499 max_sdu = 1; 1500 max_sdu = aal5_size(max_sdu); 1501 size = (max_sdu + 16) * multiplier + 16; 1502 lanai_buf_allocate(buf, size, max_sdu + 32, lanai->pci); 1503 if (unlikely(buf->start == NULL)) 1504 return -ENOMEM; 1505 if (unlikely(lanai_buf_size(buf) < size)) 1506 printk(KERN_WARNING DEV_LABEL "(itf %d): wanted %d bytes " 1507 "for %s buffer, got only %Zu\n", lanai->number, size, 1508 name, lanai_buf_size(buf)); 1509 DPRINTK("Allocated %Zu byte %s buffer\n", lanai_buf_size(buf), name); 1510 return 0; 1511} 1512 1513/* Setup a RX buffer for a currently unbound AAL5 vci */ 1514static inline int lanai_setup_rx_vci_aal5(struct lanai_dev *lanai, 1515 struct lanai_vcc *lvcc, const struct atm_qos *qos) 1516{ 1517 return lanai_get_sized_buffer(lanai, &lvcc->rx.buf, 1518 qos->rxtp.max_sdu, AAL5_RX_MULTIPLIER, "RX"); 1519} 1520 1521/* Setup a TX buffer for a currently unbound AAL5 vci */ 1522static int lanai_setup_tx_vci(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1523 const struct atm_qos *qos) 1524{ 1525 int max_sdu, multiplier; 1526 if (qos->aal == ATM_AAL0) { 1527 lvcc->tx.unqueue = vcc_tx_unqueue_aal0; 1528 max_sdu = ATM_CELL_SIZE - 1; 1529 multiplier = AAL0_TX_MULTIPLIER; 1530 } else { 1531 lvcc->tx.unqueue = vcc_tx_unqueue_aal5; 1532 max_sdu = qos->txtp.max_sdu; 1533 multiplier = AAL5_TX_MULTIPLIER; 1534 } 1535 return lanai_get_sized_buffer(lanai, &lvcc->tx.buf, max_sdu, 1536 multiplier, "TX"); 1537} 1538 1539static inline void host_vcc_bind(struct lanai_dev *lanai, 1540 struct lanai_vcc *lvcc, vci_t vci) 1541{ 1542 if (lvcc->vbase != NULL) 1543 return; /* We already were bound in the other direction */ 1544 DPRINTK("Binding vci %d\n", vci); 1545#ifdef USE_POWERDOWN 1546 if (lanai->nbound++ == 0) { 1547 DPRINTK("Coming out of powerdown\n"); 1548 lanai->conf1 &= ~CONFIG1_POWERDOWN; 1549 conf1_write(lanai); 1550 conf2_write(lanai); 1551 } 1552#endif 1553 lvcc->vbase = cardvcc_addr(lanai, vci); 1554 lanai->vccs[lvcc->vci = vci] = lvcc; 1555} 1556 1557static inline void host_vcc_unbind(struct lanai_dev *lanai, 1558 struct lanai_vcc *lvcc) 1559{ 1560 if (lvcc->vbase == NULL) 1561 return; /* This vcc was never bound */ 1562 DPRINTK("Unbinding vci %d\n", lvcc->vci); 1563 lvcc->vbase = NULL; 1564 lanai->vccs[lvcc->vci] = NULL; 1565#ifdef USE_POWERDOWN 1566 if (--lanai->nbound == 0) { 1567 DPRINTK("Going into powerdown\n"); 1568 lanai->conf1 |= CONFIG1_POWERDOWN; 1569 conf1_write(lanai); 1570 } 1571#endif 1572} 1573 1574/* -------------------- RESET CARD: */ 1575 1576static void lanai_reset(struct lanai_dev *lanai) 1577{ 1578 printk(KERN_CRIT DEV_LABEL "(itf %d): *NOT* reseting - not " 1579 "implemented\n", lanai->number); 1580 /* TODO */ 1581 /* The following is just a hack until we write the real 1582 * resetter - at least ack whatever interrupt sent us 1583 * here 1584 */ 1585 reg_write(lanai, INT_ALL, IntAck_Reg); 1586 lanai->stats.card_reset++; 1587} 1588 1589/* -------------------- SERVICE LIST UTILITIES: */ 1590 1591/* 1592 * Allocate service buffer and tell card about it 1593 */ 1594static int __devinit service_buffer_allocate(struct lanai_dev *lanai) 1595{ 1596 lanai_buf_allocate(&lanai->service, SERVICE_ENTRIES * 4, 8, 1597 lanai->pci); 1598 if (unlikely(lanai->service.start == NULL)) 1599 return -ENOMEM; 1600 DPRINTK("allocated service buffer at 0x%08lX, size %Zu(%d)\n", 1601 (unsigned long) lanai->service.start, 1602 lanai_buf_size(&lanai->service), 1603 lanai_buf_size_cardorder(&lanai->service)); 1604 /* Clear ServWrite register to be safe */ 1605 reg_write(lanai, 0, ServWrite_Reg); 1606 /* ServiceStuff register contains size and address of buffer */ 1607 reg_write(lanai, 1608 SSTUFF_SET_SIZE(lanai_buf_size_cardorder(&lanai->service)) | 1609 SSTUFF_SET_ADDR(lanai->service.dmaaddr), 1610 ServiceStuff_Reg); 1611 return 0; 1612} 1613 1614static inline void service_buffer_deallocate(struct lanai_dev *lanai) 1615{ 1616 lanai_buf_deallocate(&lanai->service, lanai->pci); 1617} 1618 1619/* Bitfields in service list */ 1620#define SERVICE_TX (0x80000000) /* Was from transmission */ 1621#define SERVICE_TRASH (0x40000000) /* RXed PDU was trashed */ 1622#define SERVICE_CRCERR (0x20000000) /* RXed PDU had CRC error */ 1623#define SERVICE_CI (0x10000000) /* RXed PDU had CI set */ 1624#define SERVICE_CLP (0x08000000) /* RXed PDU had CLP set */ 1625#define SERVICE_STREAM (0x04000000) /* RX Stream mode */ 1626#define SERVICE_GET_VCI(x) (((x)>>16)&0x3FF) 1627#define SERVICE_GET_END(x) ((x)&0x1FFF) 1628 1629/* Handle one thing from the service list - returns true if it marked a 1630 * VCC ready for xmit 1631 */ 1632static int handle_service(struct lanai_dev *lanai, u32 s) 1633{ 1634 vci_t vci = SERVICE_GET_VCI(s); 1635 struct lanai_vcc *lvcc; 1636 read_lock(&vcc_sklist_lock); 1637 lvcc = lanai->vccs[vci]; 1638 if (unlikely(lvcc == NULL)) { 1639 read_unlock(&vcc_sklist_lock); 1640 DPRINTK("(itf %d) got service entry 0x%X for nonexistent " 1641 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1642 if (s & SERVICE_TX) 1643 lanai->stats.service_notx++; 1644 else 1645 lanai->stats.service_norx++; 1646 return 0; 1647 } 1648 if (s & SERVICE_TX) { /* segmentation interrupt */ 1649 if (unlikely(lvcc->tx.atmvcc == NULL)) { 1650 read_unlock(&vcc_sklist_lock); 1651 DPRINTK("(itf %d) got service entry 0x%X for non-TX " 1652 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1653 lanai->stats.service_notx++; 1654 return 0; 1655 } 1656 __set_bit(vci, lanai->transmit_ready); 1657 lvcc->tx.endptr = SERVICE_GET_END(s); 1658 read_unlock(&vcc_sklist_lock); 1659 return 1; 1660 } 1661 if (unlikely(lvcc->rx.atmvcc == NULL)) { 1662 read_unlock(&vcc_sklist_lock); 1663 DPRINTK("(itf %d) got service entry 0x%X for non-RX " 1664 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1665 lanai->stats.service_norx++; 1666 return 0; 1667 } 1668 if (unlikely(lvcc->rx.atmvcc->qos.aal != ATM_AAL5)) { 1669 read_unlock(&vcc_sklist_lock); 1670 DPRINTK("(itf %d) got RX service entry 0x%X for non-AAL5 " 1671 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1672 lanai->stats.service_rxnotaal5++; 1673 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1674 return 0; 1675 } 1676 if (likely(!(s & (SERVICE_TRASH | SERVICE_STREAM | SERVICE_CRCERR)))) { 1677 vcc_rx_aal5(lvcc, SERVICE_GET_END(s)); 1678 read_unlock(&vcc_sklist_lock); 1679 return 0; 1680 } 1681 if (s & SERVICE_TRASH) { 1682 int bytes; 1683 read_unlock(&vcc_sklist_lock); 1684 DPRINTK("got trashed rx pdu on vci %d\n", vci); 1685 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1686 lvcc->stats.x.aal5.service_trash++; 1687 bytes = (SERVICE_GET_END(s) * 16) - 1688 (((unsigned long) lvcc->rx.buf.ptr) - 1689 ((unsigned long) lvcc->rx.buf.start)) + 47; 1690 if (bytes < 0) 1691 bytes += lanai_buf_size(&lvcc->rx.buf); 1692 lanai->stats.ovfl_trash += (bytes / 48); 1693 return 0; 1694 } 1695 if (s & SERVICE_STREAM) { 1696 read_unlock(&vcc_sklist_lock); 1697 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1698 lvcc->stats.x.aal5.service_stream++; 1699 printk(KERN_ERR DEV_LABEL "(itf %d): Got AAL5 stream " 1700 "PDU on VCI %d!\n", lanai->number, vci); 1701 lanai_reset(lanai); 1702 return 0; 1703 } 1704 DPRINTK("got rx crc error on vci %d\n", vci); 1705 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1706 lvcc->stats.x.aal5.service_rxcrc++; 1707 lvcc->rx.buf.ptr = &lvcc->rx.buf.start[SERVICE_GET_END(s) * 4]; 1708 cardvcc_write(lvcc, SERVICE_GET_END(s), vcc_rxreadptr); 1709 read_unlock(&vcc_sklist_lock); 1710 return 0; 1711} 1712 1713/* Try transmitting on all VCIs that we marked ready to serve */ 1714static void iter_transmit(struct lanai_dev *lanai, vci_t vci) 1715{ 1716 struct lanai_vcc *lvcc = lanai->vccs[vci]; 1717 if (vcc_is_backlogged(lvcc)) 1718 lvcc->tx.unqueue(lanai, lvcc, lvcc->tx.endptr); 1719} 1720 1721/* Run service queue -- called from interrupt context or with 1722 * interrupts otherwise disabled and with the lanai->servicelock 1723 * lock held 1724 */ 1725static void run_service(struct lanai_dev *lanai) 1726{ 1727 int ntx = 0; 1728 u32 wreg = reg_read(lanai, ServWrite_Reg); 1729 const u32 *end = lanai->service.start + wreg; 1730 while (lanai->service.ptr != end) { 1731 ntx += handle_service(lanai, 1732 le32_to_cpup(lanai->service.ptr++)); 1733 if (lanai->service.ptr >= lanai->service.end) 1734 lanai->service.ptr = lanai->service.start; 1735 } 1736 reg_write(lanai, wreg, ServRead_Reg); 1737 if (ntx != 0) { 1738 read_lock(&vcc_sklist_lock); 1739 vci_bitfield_iterate(lanai, lanai->transmit_ready, 1740 iter_transmit); 1741 bitmap_zero(lanai->transmit_ready, NUM_VCI); 1742 read_unlock(&vcc_sklist_lock); 1743 } 1744} 1745 1746/* -------------------- GATHER STATISTICS: */ 1747 1748static void get_statistics(struct lanai_dev *lanai) 1749{ 1750 u32 statreg = reg_read(lanai, Statistics_Reg); 1751 lanai->stats.atm_ovfl += STATS_GET_FIFO_OVFL(statreg); 1752 lanai->stats.hec_err += STATS_GET_HEC_ERR(statreg); 1753 lanai->stats.vci_trash += STATS_GET_BAD_VCI(statreg); 1754 lanai->stats.ovfl_trash += STATS_GET_BUF_OVFL(statreg); 1755} 1756 1757/* -------------------- POLLING TIMER: */ 1758 1759#ifndef DEBUG_RW 1760/* Try to undequeue 1 backlogged vcc */ 1761static void iter_dequeue(struct lanai_dev *lanai, vci_t vci) 1762{ 1763 struct lanai_vcc *lvcc = lanai->vccs[vci]; 1764 int endptr; 1765 if (lvcc == NULL || lvcc->tx.atmvcc == NULL || 1766 !vcc_is_backlogged(lvcc)) { 1767 __clear_bit(vci, lanai->backlog_vccs); 1768 return; 1769 } 1770 endptr = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr)); 1771 lvcc->tx.unqueue(lanai, lvcc, endptr); 1772} 1773#endif /* !DEBUG_RW */ 1774 1775static void lanai_timed_poll(unsigned long arg) 1776{ 1777 struct lanai_dev *lanai = (struct lanai_dev *) arg; 1778#ifndef DEBUG_RW 1779 unsigned long flags; 1780#ifdef USE_POWERDOWN 1781 if (lanai->conf1 & CONFIG1_POWERDOWN) 1782 return; 1783#endif /* USE_POWERDOWN */ 1784 local_irq_save(flags); 1785 /* If we can grab the spinlock, check if any services need to be run */ 1786 if (spin_trylock(&lanai->servicelock)) { 1787 run_service(lanai); 1788 spin_unlock(&lanai->servicelock); 1789 } 1790 /* ...and see if any backlogged VCs can make progress */ 1791 /* unfortunately linux has no read_trylock() currently */ 1792 read_lock(&vcc_sklist_lock); 1793 vci_bitfield_iterate(lanai, lanai->backlog_vccs, iter_dequeue); 1794 read_unlock(&vcc_sklist_lock); 1795 local_irq_restore(flags); 1796 1797 get_statistics(lanai); 1798#endif /* !DEBUG_RW */ 1799 mod_timer(&lanai->timer, jiffies + LANAI_POLL_PERIOD); 1800} 1801 1802static inline void lanai_timed_poll_start(struct lanai_dev *lanai) 1803{ 1804 init_timer(&lanai->timer); 1805 lanai->timer.expires = jiffies + LANAI_POLL_PERIOD; 1806 lanai->timer.data = (unsigned long) lanai; 1807 lanai->timer.function = lanai_timed_poll; 1808 add_timer(&lanai->timer); 1809} 1810 1811static inline void lanai_timed_poll_stop(struct lanai_dev *lanai) 1812{ 1813 del_timer_sync(&lanai->timer); 1814} 1815 1816/* -------------------- INTERRUPT SERVICE: */ 1817 1818static inline void lanai_int_1(struct lanai_dev *lanai, u32 reason) 1819{ 1820 u32 ack = 0; 1821 if (reason & INT_SERVICE) { 1822 ack = INT_SERVICE; 1823 spin_lock(&lanai->servicelock); 1824 run_service(lanai); 1825 spin_unlock(&lanai->servicelock); 1826 } 1827 if (reason & (INT_AAL0_STR | INT_AAL0)) { 1828 ack |= reason & (INT_AAL0_STR | INT_AAL0); 1829 vcc_rx_aal0(lanai); 1830 } 1831 /* The rest of the interrupts are pretty rare */ 1832 if (ack == reason) 1833 goto done; 1834 if (reason & INT_STATS) { 1835 reason &= ~INT_STATS; /* No need to ack */ 1836 get_statistics(lanai); 1837 } 1838 if (reason & INT_STATUS) { 1839 ack |= reason & INT_STATUS; 1840 lanai_check_status(lanai); 1841 } 1842 if (unlikely(reason & INT_DMASHUT)) { 1843 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - DMA " 1844 "shutdown, reason=0x%08X, address=0x%08X\n", 1845 lanai->number, (unsigned int) (reason & INT_DMASHUT), 1846 (unsigned int) reg_read(lanai, DMA_Addr_Reg)); 1847 if (reason & INT_TABORTBM) { 1848 lanai_reset(lanai); 1849 return; 1850 } 1851 ack |= (reason & INT_DMASHUT); 1852 printk(KERN_ERR DEV_LABEL "(itf %d): re-enabling DMA\n", 1853 lanai->number); 1854 conf1_write(lanai); 1855 lanai->stats.dma_reenable++; 1856 pcistatus_check(lanai, 0); 1857 } 1858 if (unlikely(reason & INT_TABORTSENT)) { 1859 ack |= (reason & INT_TABORTSENT); 1860 printk(KERN_ERR DEV_LABEL "(itf %d): sent PCI target abort\n", 1861 lanai->number); 1862 pcistatus_check(lanai, 0); 1863 } 1864 if (unlikely(reason & INT_SEGSHUT)) { 1865 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - " 1866 "segmentation shutdown, reason=0x%08X\n", lanai->number, 1867 (unsigned int) (reason & INT_SEGSHUT)); 1868 lanai_reset(lanai); 1869 return; 1870 } 1871 if (unlikely(reason & (INT_PING | INT_WAKE))) { 1872 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - " 1873 "unexpected interrupt 0x%08X, resetting\n", 1874 lanai->number, 1875 (unsigned int) (reason & (INT_PING | INT_WAKE))); 1876 lanai_reset(lanai); 1877 return; 1878 } 1879#ifdef DEBUG 1880 if (unlikely(ack != reason)) { 1881 DPRINTK("unacked ints: 0x%08X\n", 1882 (unsigned int) (reason & ~ack)); 1883 ack = reason; 1884 } 1885#endif 1886 done: 1887 if (ack != 0) 1888 reg_write(lanai, ack, IntAck_Reg); 1889} 1890 1891static irqreturn_t lanai_int(int irq, void *devid) 1892{ 1893 struct lanai_dev *lanai = devid; 1894 u32 reason; 1895 1896#ifdef USE_POWERDOWN 1897 /* 1898 * If we're powered down we shouldn't be generating any interrupts - 1899 * so assume that this is a shared interrupt line and it's for someone 1900 * else 1901 */ 1902 if (unlikely(lanai->conf1 & CONFIG1_POWERDOWN)) 1903 return IRQ_NONE; 1904#endif 1905 1906 reason = intr_pending(lanai); 1907 if (reason == 0) 1908 return IRQ_NONE; /* Must be for someone else */ 1909 1910 do { 1911 if (unlikely(reason == 0xFFFFFFFF)) 1912 break; /* Maybe we've been unplugged? */ 1913 lanai_int_1(lanai, reason); 1914 reason = intr_pending(lanai); 1915 } while (reason != 0); 1916 1917 return IRQ_HANDLED; 1918} 1919 1920/* TODO - it would be nice if we could use the "delayed interrupt" system 1921 * to some advantage 1922 */ 1923 1924/* -------------------- CHECK BOARD ID/REV: */ 1925 1926/* 1927 * The board id and revision are stored both in the reset register and 1928 * in the PCI configuration space - the documentation says to check 1929 * each of them. If revp!=NULL we store the revision there 1930 */ 1931static int check_board_id_and_rev(const char *name, u32 val, int *revp) 1932{ 1933 DPRINTK("%s says board_id=%d, board_rev=%d\n", name, 1934 (int) RESET_GET_BOARD_ID(val), 1935 (int) RESET_GET_BOARD_REV(val)); 1936 if (RESET_GET_BOARD_ID(val) != BOARD_ID_LANAI256) { 1937 printk(KERN_ERR DEV_LABEL ": Found %s board-id %d -- not a " 1938 "Lanai 25.6\n", name, (int) RESET_GET_BOARD_ID(val)); 1939 return -ENODEV; 1940 } 1941 if (revp != NULL) 1942 *revp = RESET_GET_BOARD_REV(val); 1943 return 0; 1944} 1945 1946/* -------------------- PCI INITIALIZATION/SHUTDOWN: */ 1947 1948static int __devinit lanai_pci_start(struct lanai_dev *lanai) 1949{ 1950 struct pci_dev *pci = lanai->pci; 1951 int result; 1952 u16 w; 1953 1954 if (pci_enable_device(pci) != 0) { 1955 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable " 1956 "PCI device", lanai->number); 1957 return -ENXIO; 1958 } 1959 pci_set_master(pci); 1960 if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) != 0) { 1961 printk(KERN_WARNING DEV_LABEL 1962 "(itf %d): No suitable DMA available.\n", lanai->number); 1963 return -EBUSY; 1964 } 1965 if (pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) != 0) { 1966 printk(KERN_WARNING DEV_LABEL 1967 "(itf %d): No suitable DMA available.\n", lanai->number); 1968 return -EBUSY; 1969 } 1970 result = pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &w); 1971 if (result != PCIBIOS_SUCCESSFUL) { 1972 printk(KERN_ERR DEV_LABEL "(itf %d): can't read " 1973 "PCI_SUBSYSTEM_ID: %d\n", lanai->number, result); 1974 return -EINVAL; 1975 } 1976 result = check_board_id_and_rev("PCI", w, NULL); 1977 if (result != 0) 1978 return result; 1979 /* Set latency timer to zero as per lanai docs */ 1980 result = pci_write_config_byte(pci, PCI_LATENCY_TIMER, 0); 1981 if (result != PCIBIOS_SUCCESSFUL) { 1982 printk(KERN_ERR DEV_LABEL "(itf %d): can't write " 1983 "PCI_LATENCY_TIMER: %d\n", lanai->number, result); 1984 return -EINVAL; 1985 } 1986 pcistatus_check(lanai, 1); 1987 pcistatus_check(lanai, 0); 1988 return 0; 1989} 1990 1991/* -------------------- VPI/VCI ALLOCATION: */ 1992 1993/* 1994 * We _can_ use VCI==0 for normal traffic, but only for UBR (or we'll 1995 * get a CBRZERO interrupt), and we can use it only if noone is receiving 1996 * AAL0 traffic (since they will use the same queue) - according to the 1997 * docs we shouldn't even use it for AAL0 traffic 1998 */ 1999static inline int vci0_is_ok(struct lanai_dev *lanai, 2000 const struct atm_qos *qos) 2001{ 2002 if (qos->txtp.traffic_class == ATM_CBR || qos->aal == ATM_AAL0) 2003 return 0; 2004 if (qos->rxtp.traffic_class != ATM_NONE) { 2005 if (lanai->naal0 != 0) 2006 return 0; 2007 lanai->conf2 |= CONFIG2_VCI0_NORMAL; 2008 conf2_write_if_powerup(lanai); 2009 } 2010 return 1; 2011} 2012 2013/* return true if vci is currently unused, or if requested qos is 2014 * compatible 2015 */ 2016static int vci_is_ok(struct lanai_dev *lanai, vci_t vci, 2017 const struct atm_vcc *atmvcc) 2018{ 2019 const struct atm_qos *qos = &atmvcc->qos; 2020 const struct lanai_vcc *lvcc = lanai->vccs[vci]; 2021 if (vci == 0 && !vci0_is_ok(lanai, qos)) 2022 return 0; 2023 if (unlikely(lvcc != NULL)) { 2024 if (qos->rxtp.traffic_class != ATM_NONE && 2025 lvcc->rx.atmvcc != NULL && lvcc->rx.atmvcc != atmvcc) 2026 return 0; 2027 if (qos->txtp.traffic_class != ATM_NONE && 2028 lvcc->tx.atmvcc != NULL && lvcc->tx.atmvcc != atmvcc) 2029 return 0; 2030 if (qos->txtp.traffic_class == ATM_CBR && 2031 lanai->cbrvcc != NULL && lanai->cbrvcc != atmvcc) 2032 return 0; 2033 } 2034 if (qos->aal == ATM_AAL0 && lanai->naal0 == 0 && 2035 qos->rxtp.traffic_class != ATM_NONE) { 2036 const struct lanai_vcc *vci0 = lanai->vccs[0]; 2037 if (vci0 != NULL && vci0->rx.atmvcc != NULL) 2038 return 0; 2039 lanai->conf2 &= ~CONFIG2_VCI0_NORMAL; 2040 conf2_write_if_powerup(lanai); 2041 } 2042 return 1; 2043} 2044 2045static int lanai_normalize_ci(struct lanai_dev *lanai, 2046 const struct atm_vcc *atmvcc, short *vpip, vci_t *vcip) 2047{ 2048 switch (*vpip) { 2049 case ATM_VPI_ANY: 2050 *vpip = 0; 2051 /* FALLTHROUGH */ 2052 case 0: 2053 break; 2054 default: 2055 return -EADDRINUSE; 2056 } 2057 switch (*vcip) { 2058 case ATM_VCI_ANY: 2059 for (*vcip = ATM_NOT_RSV_VCI; *vcip < lanai->num_vci; 2060 (*vcip)++) 2061 if (vci_is_ok(lanai, *vcip, atmvcc)) 2062 return 0; 2063 return -EADDRINUSE; 2064 default: 2065 if (*vcip >= lanai->num_vci || *vcip < 0 || 2066 !vci_is_ok(lanai, *vcip, atmvcc)) 2067 return -EADDRINUSE; 2068 } 2069 return 0; 2070} 2071 2072/* -------------------- MANAGE CBR: */ 2073 2074/* 2075 * CBR ICG is stored as a fixed-point number with 4 fractional bits. 2076 * Note that storing a number greater than 2046.0 will result in 2077 * incorrect shaping 2078 */ 2079#define CBRICG_FRAC_BITS (4) 2080#define CBRICG_MAX (2046 << CBRICG_FRAC_BITS) 2081 2082/* 2083 * ICG is related to PCR with the formula PCR = MAXPCR / (ICG + 1) 2084 * where MAXPCR is (according to the docs) 25600000/(54*8), 2085 * which is equal to (3125<<9)/27. 2086 * 2087 * Solving for ICG, we get: 2088 * ICG = MAXPCR/PCR - 1 2089 * ICG = (3125<<9)/(27*PCR) - 1 2090 * ICG = ((3125<<9) - (27*PCR)) / (27*PCR) 2091 * 2092 * The end result is supposed to be a fixed-point number with FRAC_BITS 2093 * bits of a fractional part, so we keep everything in the numerator 2094 * shifted by that much as we compute 2095 * 2096 */ 2097static int pcr_to_cbricg(const struct atm_qos *qos) 2098{ 2099 int rounddown = 0; /* 1 = Round PCR down, i.e. round ICG _up_ */ 2100 int x, icg, pcr = atm_pcr_goal(&qos->txtp); 2101 if (pcr == 0) /* Use maximum bandwidth */ 2102 return 0; 2103 if (pcr < 0) { 2104 rounddown = 1; 2105 pcr = -pcr; 2106 } 2107 x = pcr * 27; 2108 icg = (3125 << (9 + CBRICG_FRAC_BITS)) - (x << CBRICG_FRAC_BITS); 2109 if (rounddown) 2110 icg += x - 1; 2111 icg /= x; 2112 if (icg > CBRICG_MAX) 2113 icg = CBRICG_MAX; 2114 DPRINTK("pcr_to_cbricg: pcr=%d rounddown=%c icg=%d\n", 2115 pcr, rounddown ? 'Y' : 'N', icg); 2116 return icg; 2117} 2118 2119static inline void lanai_cbr_setup(struct lanai_dev *lanai) 2120{ 2121 reg_write(lanai, pcr_to_cbricg(&lanai->cbrvcc->qos), CBR_ICG_Reg); 2122 reg_write(lanai, lanai->cbrvcc->vci, CBR_PTR_Reg); 2123 lanai->conf2 |= CONFIG2_CBR_ENABLE; 2124 conf2_write(lanai); 2125} 2126 2127static inline void lanai_cbr_shutdown(struct lanai_dev *lanai) 2128{ 2129 lanai->conf2 &= ~CONFIG2_CBR_ENABLE; 2130 conf2_write(lanai); 2131} 2132 2133/* -------------------- OPERATIONS: */ 2134 2135/* setup a newly detected device */ 2136static int __devinit lanai_dev_open(struct atm_dev *atmdev) 2137{ 2138 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2139 unsigned long raw_base; 2140 int result; 2141 2142 DPRINTK("In lanai_dev_open()\n"); 2143 /* Basic device fields */ 2144 lanai->number = atmdev->number; 2145 lanai->num_vci = NUM_VCI; 2146 bitmap_zero(lanai->backlog_vccs, NUM_VCI); 2147 bitmap_zero(lanai->transmit_ready, NUM_VCI); 2148 lanai->naal0 = 0; 2149#ifdef USE_POWERDOWN 2150 lanai->nbound = 0; 2151#endif 2152 lanai->cbrvcc = NULL; 2153 memset(&lanai->stats, 0, sizeof lanai->stats); 2154 spin_lock_init(&lanai->endtxlock); 2155 spin_lock_init(&lanai->servicelock); 2156 atmdev->ci_range.vpi_bits = 0; 2157 atmdev->ci_range.vci_bits = 0; 2158 while (1 << atmdev->ci_range.vci_bits < lanai->num_vci) 2159 atmdev->ci_range.vci_bits++; 2160 atmdev->link_rate = ATM_25_PCR; 2161 2162 /* 3.2: PCI initialization */ 2163 if ((result = lanai_pci_start(lanai)) != 0) 2164 goto error; 2165 raw_base = lanai->pci->resource[0].start; 2166 lanai->base = (bus_addr_t) ioremap(raw_base, LANAI_MAPPING_SIZE); 2167 if (lanai->base == NULL) { 2168 printk(KERN_ERR DEV_LABEL ": couldn't remap I/O space\n"); 2169 goto error_pci; 2170 } 2171 /* 3.3: Reset lanai and PHY */ 2172 reset_board(lanai); 2173 lanai->conf1 = reg_read(lanai, Config1_Reg); 2174 lanai->conf1 &= ~(CONFIG1_GPOUT1 | CONFIG1_POWERDOWN | 2175 CONFIG1_MASK_LEDMODE); 2176 lanai->conf1 |= CONFIG1_SET_LEDMODE(LEDMODE_NOT_SOOL); 2177 reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg); 2178 udelay(1000); 2179 conf1_write(lanai); 2180 2181 /* 2182 * 3.4: Turn on endian mode for big-endian hardware 2183 * We don't actually want to do this - the actual bit fields 2184 * in the endian register are not documented anywhere. 2185 * Instead we do the bit-flipping ourselves on big-endian 2186 * hardware. 2187 * 2188 * 3.5: get the board ID/rev by reading the reset register 2189 */ 2190 result = check_board_id_and_rev("register", 2191 reg_read(lanai, Reset_Reg), &lanai->board_rev); 2192 if (result != 0) 2193 goto error_unmap; 2194 2195 /* 3.6: read EEPROM */ 2196 if ((result = eeprom_read(lanai)) != 0) 2197 goto error_unmap; 2198 if ((result = eeprom_validate(lanai)) != 0) 2199 goto error_unmap; 2200 2201 /* 3.7: re-reset PHY, do loopback tests, setup PHY */ 2202 reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg); 2203 udelay(1000); 2204 conf1_write(lanai); 2205 /* TODO - loopback tests */ 2206 lanai->conf1 |= (CONFIG1_GPOUT2 | CONFIG1_GPOUT3 | CONFIG1_DMA_ENABLE); 2207 conf1_write(lanai); 2208 2209 /* 3.8/3.9: test and initialize card SRAM */ 2210 if ((result = sram_test_and_clear(lanai)) != 0) 2211 goto error_unmap; 2212 2213 /* 3.10: initialize lanai registers */ 2214 lanai->conf1 |= CONFIG1_DMA_ENABLE; 2215 conf1_write(lanai); 2216 if ((result = service_buffer_allocate(lanai)) != 0) 2217 goto error_unmap; 2218 if ((result = vcc_table_allocate(lanai)) != 0) 2219 goto error_service; 2220 lanai->conf2 = (lanai->num_vci >= 512 ? CONFIG2_HOWMANY : 0) | 2221 CONFIG2_HEC_DROP | /* ??? */ CONFIG2_PTI7_MODE; 2222 conf2_write(lanai); 2223 reg_write(lanai, TX_FIFO_DEPTH, TxDepth_Reg); 2224 reg_write(lanai, 0, CBR_ICG_Reg); /* CBR defaults to no limit */ 2225 if ((result = request_irq(lanai->pci->irq, lanai_int, IRQF_SHARED, 2226 DEV_LABEL, lanai)) != 0) { 2227 printk(KERN_ERR DEV_LABEL ": can't allocate interrupt\n"); 2228 goto error_vcctable; 2229 } 2230 mb(); /* Make sure that all that made it */ 2231 intr_enable(lanai, INT_ALL & ~(INT_PING | INT_WAKE)); 2232 /* 3.11: initialize loop mode (i.e. turn looping off) */ 2233 lanai->conf1 = (lanai->conf1 & ~CONFIG1_MASK_LOOPMODE) | 2234 CONFIG1_SET_LOOPMODE(LOOPMODE_NORMAL) | 2235 CONFIG1_GPOUT2 | CONFIG1_GPOUT3; 2236 conf1_write(lanai); 2237 lanai->status = reg_read(lanai, Status_Reg); 2238 /* We're now done initializing this card */ 2239#ifdef USE_POWERDOWN 2240 lanai->conf1 |= CONFIG1_POWERDOWN; 2241 conf1_write(lanai); 2242#endif 2243 memcpy(atmdev->esi, eeprom_mac(lanai), ESI_LEN); 2244 lanai_timed_poll_start(lanai); 2245 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d, base=0x%lx, irq=%u " 2246 "(%02X-%02X-%02X-%02X-%02X-%02X)\n", lanai->number, 2247 (int) lanai->pci->revision, (unsigned long) lanai->base, 2248 lanai->pci->irq, 2249 atmdev->esi[0], atmdev->esi[1], atmdev->esi[2], 2250 atmdev->esi[3], atmdev->esi[4], atmdev->esi[5]); 2251 printk(KERN_NOTICE DEV_LABEL "(itf %d): LANAI%s, serialno=%u(0x%X), " 2252 "board_rev=%d\n", lanai->number, 2253 lanai->type==lanai2 ? "2" : "HB", (unsigned int) lanai->serialno, 2254 (unsigned int) lanai->serialno, lanai->board_rev); 2255 return 0; 2256 2257 error_vcctable: 2258 vcc_table_deallocate(lanai); 2259 error_service: 2260 service_buffer_deallocate(lanai); 2261 error_unmap: 2262 reset_board(lanai); 2263#ifdef USE_POWERDOWN 2264 lanai->conf1 = reg_read(lanai, Config1_Reg) | CONFIG1_POWERDOWN; 2265 conf1_write(lanai); 2266#endif 2267 iounmap(lanai->base); 2268 error_pci: 2269 pci_disable_device(lanai->pci); 2270 error: 2271 return result; 2272} 2273 2274/* called when device is being shutdown, and all vcc's are gone - higher 2275 * levels will deallocate the atm device for us 2276 */ 2277static void lanai_dev_close(struct atm_dev *atmdev) 2278{ 2279 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2280 printk(KERN_INFO DEV_LABEL "(itf %d): shutting down interface\n", 2281 lanai->number); 2282 lanai_timed_poll_stop(lanai); 2283#ifdef USE_POWERDOWN 2284 lanai->conf1 = reg_read(lanai, Config1_Reg) & ~CONFIG1_POWERDOWN; 2285 conf1_write(lanai); 2286#endif 2287 intr_disable(lanai, INT_ALL); 2288 free_irq(lanai->pci->irq, lanai); 2289 reset_board(lanai); 2290#ifdef USE_POWERDOWN 2291 lanai->conf1 |= CONFIG1_POWERDOWN; 2292 conf1_write(lanai); 2293#endif 2294 pci_disable_device(lanai->pci); 2295 vcc_table_deallocate(lanai); 2296 service_buffer_deallocate(lanai); 2297 iounmap(lanai->base); 2298 kfree(lanai); 2299} 2300 2301/* close a vcc */ 2302static void lanai_close(struct atm_vcc *atmvcc) 2303{ 2304 struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data; 2305 struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2306 if (lvcc == NULL) 2307 return; 2308 clear_bit(ATM_VF_READY, &atmvcc->flags); 2309 clear_bit(ATM_VF_PARTIAL, &atmvcc->flags); 2310 if (lvcc->rx.atmvcc == atmvcc) { 2311 lanai_shutdown_rx_vci(lvcc); 2312 if (atmvcc->qos.aal == ATM_AAL0) { 2313 if (--lanai->naal0 <= 0) 2314 aal0_buffer_free(lanai); 2315 } else 2316 lanai_buf_deallocate(&lvcc->rx.buf, lanai->pci); 2317 lvcc->rx.atmvcc = NULL; 2318 } 2319 if (lvcc->tx.atmvcc == atmvcc) { 2320 if (atmvcc == lanai->cbrvcc) { 2321 if (lvcc->vbase != NULL) 2322 lanai_cbr_shutdown(lanai); 2323 lanai->cbrvcc = NULL; 2324 } 2325 lanai_shutdown_tx_vci(lanai, lvcc); 2326 lanai_buf_deallocate(&lvcc->tx.buf, lanai->pci); 2327 lvcc->tx.atmvcc = NULL; 2328 } 2329 if (--lvcc->nref == 0) { 2330 host_vcc_unbind(lanai, lvcc); 2331 kfree(lvcc); 2332 } 2333 atmvcc->dev_data = NULL; 2334 clear_bit(ATM_VF_ADDR, &atmvcc->flags); 2335} 2336 2337/* open a vcc on the card to vpi/vci */ 2338static int lanai_open(struct atm_vcc *atmvcc) 2339{ 2340 struct lanai_dev *lanai; 2341 struct lanai_vcc *lvcc; 2342 int result = 0; 2343 int vci = atmvcc->vci; 2344 short vpi = atmvcc->vpi; 2345 /* we don't support partial open - it's not really useful anyway */ 2346 if ((test_bit(ATM_VF_PARTIAL, &atmvcc->flags)) || 2347 (vpi == ATM_VPI_UNSPEC) || (vci == ATM_VCI_UNSPEC)) 2348 return -EINVAL; 2349 lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2350 result = lanai_normalize_ci(lanai, atmvcc, &vpi, &vci); 2351 if (unlikely(result != 0)) 2352 goto out; 2353 set_bit(ATM_VF_ADDR, &atmvcc->flags); 2354 if (atmvcc->qos.aal != ATM_AAL0 && atmvcc->qos.aal != ATM_AAL5) 2355 return -EINVAL; 2356 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n", lanai->number, 2357 (int) vpi, vci); 2358 lvcc = lanai->vccs[vci]; 2359 if (lvcc == NULL) { 2360 lvcc = new_lanai_vcc(); 2361 if (unlikely(lvcc == NULL)) 2362 return -ENOMEM; 2363 atmvcc->dev_data = lvcc; 2364 } 2365 lvcc->nref++; 2366 if (atmvcc->qos.rxtp.traffic_class != ATM_NONE) { 2367 APRINTK(lvcc->rx.atmvcc == NULL, "rx.atmvcc!=NULL, vci=%d\n", 2368 vci); 2369 if (atmvcc->qos.aal == ATM_AAL0) { 2370 if (lanai->naal0 == 0) 2371 result = aal0_buffer_allocate(lanai); 2372 } else 2373 result = lanai_setup_rx_vci_aal5( 2374 lanai, lvcc, &atmvcc->qos); 2375 if (unlikely(result != 0)) 2376 goto out_free; 2377 lvcc->rx.atmvcc = atmvcc; 2378 lvcc->stats.rx_nomem = 0; 2379 lvcc->stats.x.aal5.rx_badlen = 0; 2380 lvcc->stats.x.aal5.service_trash = 0; 2381 lvcc->stats.x.aal5.service_stream = 0; 2382 lvcc->stats.x.aal5.service_rxcrc = 0; 2383 if (atmvcc->qos.aal == ATM_AAL0) 2384 lanai->naal0++; 2385 } 2386 if (atmvcc->qos.txtp.traffic_class != ATM_NONE) { 2387 APRINTK(lvcc->tx.atmvcc == NULL, "tx.atmvcc!=NULL, vci=%d\n", 2388 vci); 2389 result = lanai_setup_tx_vci(lanai, lvcc, &atmvcc->qos); 2390 if (unlikely(result != 0)) 2391 goto out_free; 2392 lvcc->tx.atmvcc = atmvcc; 2393 if (atmvcc->qos.txtp.traffic_class == ATM_CBR) { 2394 APRINTK(lanai->cbrvcc == NULL, 2395 "cbrvcc!=NULL, vci=%d\n", vci); 2396 lanai->cbrvcc = atmvcc; 2397 } 2398 } 2399 host_vcc_bind(lanai, lvcc, vci); 2400 /* 2401 * Make sure everything made it to RAM before we tell the card about 2402 * the VCC 2403 */ 2404 wmb(); 2405 if (atmvcc == lvcc->rx.atmvcc) 2406 host_vcc_start_rx(lvcc); 2407 if (atmvcc == lvcc->tx.atmvcc) { 2408 host_vcc_start_tx(lvcc); 2409 if (lanai->cbrvcc == atmvcc) 2410 lanai_cbr_setup(lanai); 2411 } 2412 set_bit(ATM_VF_READY, &atmvcc->flags); 2413 return 0; 2414 out_free: 2415 lanai_close(atmvcc); 2416 out: 2417 return result; 2418} 2419 2420static int lanai_send(struct atm_vcc *atmvcc, struct sk_buff *skb) 2421{ 2422 struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data; 2423 struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2424 unsigned long flags; 2425 if (unlikely(lvcc == NULL || lvcc->vbase == NULL || 2426 lvcc->tx.atmvcc != atmvcc)) 2427 goto einval; 2428#ifdef DEBUG 2429 if (unlikely(skb == NULL)) { 2430 DPRINTK("lanai_send: skb==NULL for vci=%d\n", atmvcc->vci); 2431 goto einval; 2432 } 2433 if (unlikely(lanai == NULL)) { 2434 DPRINTK("lanai_send: lanai==NULL for vci=%d\n", atmvcc->vci); 2435 goto einval; 2436 } 2437#endif 2438 ATM_SKB(skb)->vcc = atmvcc; 2439 switch (atmvcc->qos.aal) { 2440 case ATM_AAL5: 2441 read_lock_irqsave(&vcc_sklist_lock, flags); 2442 vcc_tx_aal5(lanai, lvcc, skb); 2443 read_unlock_irqrestore(&vcc_sklist_lock, flags); 2444 return 0; 2445 case ATM_AAL0: 2446 if (unlikely(skb->len != ATM_CELL_SIZE-1)) 2447 goto einval; 2448 /* NOTE - this next line is technically invalid - we haven't unshared skb */ 2449 cpu_to_be32s((u32 *) skb->data); 2450 read_lock_irqsave(&vcc_sklist_lock, flags); 2451 vcc_tx_aal0(lanai, lvcc, skb); 2452 read_unlock_irqrestore(&vcc_sklist_lock, flags); 2453 return 0; 2454 } 2455 DPRINTK("lanai_send: bad aal=%d on vci=%d\n", (int) atmvcc->qos.aal, 2456 atmvcc->vci); 2457 einval: 2458 lanai_free_skb(atmvcc, skb); 2459 return -EINVAL; 2460} 2461 2462static int lanai_change_qos(struct atm_vcc *atmvcc, 2463 /*const*/ struct atm_qos *qos, int flags) 2464{ 2465 return -EBUSY; /* TODO: need to write this */ 2466} 2467 2468#ifndef CONFIG_PROC_FS 2469#define lanai_proc_read NULL 2470#else 2471static int lanai_proc_read(struct atm_dev *atmdev, loff_t *pos, char *page) 2472{ 2473 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2474 loff_t left = *pos; 2475 struct lanai_vcc *lvcc; 2476 if (left-- == 0) 2477 return sprintf(page, DEV_LABEL "(itf %d): chip=LANAI%s, " 2478 "serial=%u, magic=0x%08X, num_vci=%d\n", 2479 atmdev->number, lanai->type==lanai2 ? "2" : "HB", 2480 (unsigned int) lanai->serialno, 2481 (unsigned int) lanai->magicno, lanai->num_vci); 2482 if (left-- == 0) 2483 return sprintf(page, "revision: board=%d, pci_if=%d\n", 2484 lanai->board_rev, (int) lanai->pci->revision); 2485 if (left-- == 0) 2486 return sprintf(page, "EEPROM ESI: " 2487 "%02X:%02X:%02X:%02X:%02X:%02X\n", 2488 lanai->eeprom[EEPROM_MAC + 0], 2489 lanai->eeprom[EEPROM_MAC + 1], 2490 lanai->eeprom[EEPROM_MAC + 2], 2491 lanai->eeprom[EEPROM_MAC + 3], 2492 lanai->eeprom[EEPROM_MAC + 4], 2493 lanai->eeprom[EEPROM_MAC + 5]); 2494 if (left-- == 0) 2495 return sprintf(page, "status: SOOL=%d, LOCD=%d, LED=%d, " 2496 "GPIN=%d\n", (lanai->status & STATUS_SOOL) ? 1 : 0, 2497 (lanai->status & STATUS_LOCD) ? 1 : 0, 2498 (lanai->status & STATUS_LED) ? 1 : 0, 2499 (lanai->status & STATUS_GPIN) ? 1 : 0); 2500 if (left-- == 0) 2501 return sprintf(page, "global buffer sizes: service=%Zu, " 2502 "aal0_rx=%Zu\n", lanai_buf_size(&lanai->service), 2503 lanai->naal0 ? lanai_buf_size(&lanai->aal0buf) : 0); 2504 if (left-- == 0) { 2505 get_statistics(lanai); 2506 return sprintf(page, "cells in error: overflow=%u, " 2507 "closed_vci=%u, bad_HEC=%u, rx_fifo=%u\n", 2508 lanai->stats.ovfl_trash, lanai->stats.vci_trash, 2509 lanai->stats.hec_err, lanai->stats.atm_ovfl); 2510 } 2511 if (left-- == 0) 2512 return sprintf(page, "PCI errors: parity_detect=%u, " 2513 "master_abort=%u, master_target_abort=%u,\n", 2514 lanai->stats.pcierr_parity_detect, 2515 lanai->stats.pcierr_serr_set, 2516 lanai->stats.pcierr_m_target_abort); 2517 if (left-- == 0) 2518 return sprintf(page, " slave_target_abort=%u, " 2519 "master_parity=%u\n", lanai->stats.pcierr_s_target_abort, 2520 lanai->stats.pcierr_master_parity); 2521 if (left-- == 0) 2522 return sprintf(page, " no_tx=%u, " 2523 "no_rx=%u, bad_rx_aal=%u\n", lanai->stats.service_norx, 2524 lanai->stats.service_notx, 2525 lanai->stats.service_rxnotaal5); 2526 if (left-- == 0) 2527 return sprintf(page, "resets: dma=%u, card=%u\n", 2528 lanai->stats.dma_reenable, lanai->stats.card_reset); 2529 /* At this point, "left" should be the VCI we're looking for */ 2530 read_lock(&vcc_sklist_lock); 2531 for (; ; left++) { 2532 if (left >= NUM_VCI) { 2533 left = 0; 2534 goto out; 2535 } 2536 if ((lvcc = lanai->vccs[left]) != NULL) 2537 break; 2538 (*pos)++; 2539 } 2540 /* Note that we re-use "left" here since we're done with it */ 2541 left = sprintf(page, "VCI %4d: nref=%d, rx_nomem=%u", (vci_t) left, 2542 lvcc->nref, lvcc->stats.rx_nomem); 2543 if (lvcc->rx.atmvcc != NULL) { 2544 left += sprintf(&page[left], ",\n rx_AAL=%d", 2545 lvcc->rx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0); 2546 if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5) 2547 left += sprintf(&page[left], ", rx_buf_size=%Zu, " 2548 "rx_bad_len=%u,\n rx_service_trash=%u, " 2549 "rx_service_stream=%u, rx_bad_crc=%u", 2550 lanai_buf_size(&lvcc->rx.buf), 2551 lvcc->stats.x.aal5.rx_badlen, 2552 lvcc->stats.x.aal5.service_trash, 2553 lvcc->stats.x.aal5.service_stream, 2554 lvcc->stats.x.aal5.service_rxcrc); 2555 } 2556 if (lvcc->tx.atmvcc != NULL) 2557 left += sprintf(&page[left], ",\n tx_AAL=%d, " 2558 "tx_buf_size=%Zu, tx_qos=%cBR, tx_backlogged=%c", 2559 lvcc->tx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0, 2560 lanai_buf_size(&lvcc->tx.buf), 2561 lvcc->tx.atmvcc == lanai->cbrvcc ? 'C' : 'U', 2562 vcc_is_backlogged(lvcc) ? 'Y' : 'N'); 2563 page[left++] = '\n'; 2564 page[left] = '\0'; 2565 out: 2566 read_unlock(&vcc_sklist_lock); 2567 return left; 2568} 2569#endif /* CONFIG_PROC_FS */ 2570 2571/* -------------------- HOOKS: */ 2572 2573static const struct atmdev_ops ops = { 2574 .dev_close = lanai_dev_close, 2575 .open = lanai_open, 2576 .close = lanai_close, 2577 .getsockopt = NULL, 2578 .setsockopt = NULL, 2579 .send = lanai_send, 2580 .phy_put = NULL, 2581 .phy_get = NULL, 2582 .change_qos = lanai_change_qos, 2583 .proc_read = lanai_proc_read, 2584 .owner = THIS_MODULE 2585}; 2586 2587/* initialize one probed card */ 2588static int __devinit lanai_init_one(struct pci_dev *pci, 2589 const struct pci_device_id *ident) 2590{ 2591 struct lanai_dev *lanai; 2592 struct atm_dev *atmdev; 2593 int result; 2594 2595 lanai = kmalloc(sizeof(*lanai), GFP_KERNEL); 2596 if (lanai == NULL) { 2597 printk(KERN_ERR DEV_LABEL 2598 ": couldn't allocate dev_data structure!\n"); 2599 return -ENOMEM; 2600 } 2601 2602 atmdev = atm_dev_register(DEV_LABEL, &ops, -1, NULL); 2603 if (atmdev == NULL) { 2604 printk(KERN_ERR DEV_LABEL 2605 ": couldn't register atm device!\n"); 2606 kfree(lanai); 2607 return -EBUSY; 2608 } 2609 2610 atmdev->dev_data = lanai; 2611 lanai->pci = pci; 2612 lanai->type = (enum lanai_type) ident->device; 2613 2614 result = lanai_dev_open(atmdev); 2615 if (result != 0) { 2616 DPRINTK("lanai_start() failed, err=%d\n", -result); 2617 atm_dev_deregister(atmdev); 2618 kfree(lanai); 2619 } 2620 return result; 2621} 2622 2623static struct pci_device_id lanai_pci_tbl[] = { 2624 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAI2) }, 2625 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAIHB) }, 2626 { 0, } /* terminal entry */ 2627}; 2628MODULE_DEVICE_TABLE(pci, lanai_pci_tbl); 2629 2630static struct pci_driver lanai_driver = { 2631 .name = DEV_LABEL, 2632 .id_table = lanai_pci_tbl, 2633 .probe = lanai_init_one, 2634}; 2635 2636static int __init lanai_module_init(void) 2637{ 2638 int x; 2639 2640 x = pci_register_driver(&lanai_driver); 2641 if (x != 0) 2642 printk(KERN_ERR DEV_LABEL ": no adapter found\n"); 2643 return x; 2644} 2645 2646static void __exit lanai_module_exit(void) 2647{ 2648 /* We'll only get called when all the interfaces are already 2649 * gone, so there isn't much to do 2650 */ 2651 DPRINTK("cleanup_module()\n"); 2652 pci_unregister_driver(&lanai_driver); 2653} 2654 2655module_init(lanai_module_init); 2656module_exit(lanai_module_exit); 2657 2658MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>"); 2659MODULE_DESCRIPTION("Efficient Networks Speedstream 3010 driver"); 2660MODULE_LICENSE("GPL"); 2661